78365411b3
We need a reserve for allocating buckets for new btree nodes - and now that we've got multiple btrees, it really needs to be per btree. This reworks the reserves so we've got separate freelists for each reserve instead of watermarks, which seems to make things a bit cleaner, and it adds some code so that btree_split() can make sure the reserve is available before it starts. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
461 lines
10 KiB
C
461 lines
10 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM bcache
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#if !defined(_TRACE_BCACHE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_BCACHE_H
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(bcache_request,
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TP_PROTO(struct bcache_device *d, struct bio *bio),
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TP_ARGS(d, bio),
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TP_STRUCT__entry(
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__field(dev_t, dev )
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__field(unsigned int, orig_major )
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__field(unsigned int, orig_minor )
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__field(sector_t, sector )
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__field(dev_t, orig_sector )
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__field(unsigned int, nr_sector )
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__array(char, rwbs, 6 )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->orig_major = d->disk->major;
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__entry->orig_minor = d->disk->first_minor;
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__entry->sector = bio->bi_iter.bi_sector;
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__entry->orig_sector = bio->bi_iter.bi_sector - 16;
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__entry->nr_sector = bio->bi_iter.bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
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),
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TP_printk("%d,%d %s %llu + %u (from %d,%d @ %llu)",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, (unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->orig_major, __entry->orig_minor,
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(unsigned long long)__entry->orig_sector)
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);
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DECLARE_EVENT_CLASS(bkey,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k),
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TP_STRUCT__entry(
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__field(u32, size )
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__field(u32, inode )
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__field(u64, offset )
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__field(bool, dirty )
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),
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TP_fast_assign(
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__entry->inode = KEY_INODE(k);
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__entry->offset = KEY_OFFSET(k);
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__entry->size = KEY_SIZE(k);
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__entry->dirty = KEY_DIRTY(k);
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),
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TP_printk("%u:%llu len %u dirty %u", __entry->inode,
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__entry->offset, __entry->size, __entry->dirty)
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);
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DECLARE_EVENT_CLASS(btree_node,
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TP_PROTO(struct btree *b),
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TP_ARGS(b),
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TP_STRUCT__entry(
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__field(size_t, bucket )
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),
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TP_fast_assign(
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__entry->bucket = PTR_BUCKET_NR(b->c, &b->key, 0);
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),
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TP_printk("bucket %zu", __entry->bucket)
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);
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/* request.c */
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DEFINE_EVENT(bcache_request, bcache_request_start,
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TP_PROTO(struct bcache_device *d, struct bio *bio),
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TP_ARGS(d, bio)
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);
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DEFINE_EVENT(bcache_request, bcache_request_end,
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TP_PROTO(struct bcache_device *d, struct bio *bio),
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TP_ARGS(d, bio)
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);
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DECLARE_EVENT_CLASS(bcache_bio,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio),
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TP_STRUCT__entry(
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__field(dev_t, dev )
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__field(sector_t, sector )
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__field(unsigned int, nr_sector )
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__array(char, rwbs, 6 )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_iter.bi_sector;
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__entry->nr_sector = bio->bi_iter.bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
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),
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TP_printk("%d,%d %s %llu + %u",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector, __entry->nr_sector)
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);
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DEFINE_EVENT(bcache_bio, bcache_bypass_sequential,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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DEFINE_EVENT(bcache_bio, bcache_bypass_congested,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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TRACE_EVENT(bcache_read,
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TP_PROTO(struct bio *bio, bool hit, bool bypass),
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TP_ARGS(bio, hit, bypass),
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TP_STRUCT__entry(
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__field(dev_t, dev )
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__field(sector_t, sector )
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__field(unsigned int, nr_sector )
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__array(char, rwbs, 6 )
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__field(bool, cache_hit )
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__field(bool, bypass )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_iter.bi_sector;
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__entry->nr_sector = bio->bi_iter.bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
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__entry->cache_hit = hit;
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__entry->bypass = bypass;
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),
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TP_printk("%d,%d %s %llu + %u hit %u bypass %u",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, (unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->cache_hit, __entry->bypass)
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);
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TRACE_EVENT(bcache_write,
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TP_PROTO(struct bio *bio, bool writeback, bool bypass),
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TP_ARGS(bio, writeback, bypass),
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TP_STRUCT__entry(
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__field(dev_t, dev )
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__field(sector_t, sector )
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__field(unsigned int, nr_sector )
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__array(char, rwbs, 6 )
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__field(bool, writeback )
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__field(bool, bypass )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_iter.bi_sector;
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__entry->nr_sector = bio->bi_iter.bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
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__entry->writeback = writeback;
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__entry->bypass = bypass;
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),
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TP_printk("%d,%d %s %llu + %u hit %u bypass %u",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, (unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->writeback, __entry->bypass)
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);
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DEFINE_EVENT(bcache_bio, bcache_read_retry,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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DEFINE_EVENT(bkey, bcache_cache_insert,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k)
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);
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/* Journal */
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DECLARE_EVENT_CLASS(cache_set,
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TP_PROTO(struct cache_set *c),
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TP_ARGS(c),
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TP_STRUCT__entry(
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__array(char, uuid, 16 )
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),
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TP_fast_assign(
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memcpy(__entry->uuid, c->sb.set_uuid, 16);
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),
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TP_printk("%pU", __entry->uuid)
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);
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DEFINE_EVENT(bkey, bcache_journal_replay_key,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k)
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);
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DEFINE_EVENT(cache_set, bcache_journal_full,
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TP_PROTO(struct cache_set *c),
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TP_ARGS(c)
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);
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DEFINE_EVENT(cache_set, bcache_journal_entry_full,
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TP_PROTO(struct cache_set *c),
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TP_ARGS(c)
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);
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DEFINE_EVENT(bcache_bio, bcache_journal_write,
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TP_PROTO(struct bio *bio),
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TP_ARGS(bio)
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);
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/* Btree */
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DEFINE_EVENT(cache_set, bcache_btree_cache_cannibalize,
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TP_PROTO(struct cache_set *c),
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TP_ARGS(c)
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);
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DEFINE_EVENT(btree_node, bcache_btree_read,
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TP_PROTO(struct btree *b),
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TP_ARGS(b)
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);
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TRACE_EVENT(bcache_btree_write,
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TP_PROTO(struct btree *b),
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TP_ARGS(b),
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TP_STRUCT__entry(
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__field(size_t, bucket )
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__field(unsigned, block )
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__field(unsigned, keys )
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),
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TP_fast_assign(
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__entry->bucket = PTR_BUCKET_NR(b->c, &b->key, 0);
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__entry->block = b->written;
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__entry->keys = b->sets[b->nsets].data->keys;
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),
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TP_printk("bucket %zu", __entry->bucket)
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);
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DEFINE_EVENT(btree_node, bcache_btree_node_alloc,
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TP_PROTO(struct btree *b),
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TP_ARGS(b)
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);
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DEFINE_EVENT(btree_node, bcache_btree_node_alloc_fail,
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TP_PROTO(struct btree *b),
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TP_ARGS(b)
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);
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DEFINE_EVENT(btree_node, bcache_btree_node_free,
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TP_PROTO(struct btree *b),
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TP_ARGS(b)
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);
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TRACE_EVENT(bcache_btree_gc_coalesce,
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TP_PROTO(unsigned nodes),
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TP_ARGS(nodes),
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TP_STRUCT__entry(
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__field(unsigned, nodes )
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),
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TP_fast_assign(
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__entry->nodes = nodes;
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),
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TP_printk("coalesced %u nodes", __entry->nodes)
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);
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DEFINE_EVENT(cache_set, bcache_gc_start,
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TP_PROTO(struct cache_set *c),
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TP_ARGS(c)
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);
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DEFINE_EVENT(cache_set, bcache_gc_end,
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TP_PROTO(struct cache_set *c),
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TP_ARGS(c)
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);
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DEFINE_EVENT(bkey, bcache_gc_copy,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k)
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);
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DEFINE_EVENT(bkey, bcache_gc_copy_collision,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k)
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);
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TRACE_EVENT(bcache_btree_insert_key,
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TP_PROTO(struct btree *b, struct bkey *k, unsigned op, unsigned status),
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TP_ARGS(b, k, op, status),
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TP_STRUCT__entry(
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__field(u64, btree_node )
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__field(u32, btree_level )
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__field(u32, inode )
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__field(u64, offset )
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__field(u32, size )
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__field(u8, dirty )
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__field(u8, op )
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__field(u8, status )
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),
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TP_fast_assign(
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__entry->btree_node = PTR_BUCKET_NR(b->c, &b->key, 0);
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__entry->btree_level = b->level;
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__entry->inode = KEY_INODE(k);
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__entry->offset = KEY_OFFSET(k);
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__entry->size = KEY_SIZE(k);
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__entry->dirty = KEY_DIRTY(k);
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__entry->op = op;
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__entry->status = status;
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),
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TP_printk("%u for %u at %llu(%u): %u:%llu len %u dirty %u",
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__entry->status, __entry->op,
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__entry->btree_node, __entry->btree_level,
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__entry->inode, __entry->offset,
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__entry->size, __entry->dirty)
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);
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DECLARE_EVENT_CLASS(btree_split,
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TP_PROTO(struct btree *b, unsigned keys),
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TP_ARGS(b, keys),
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TP_STRUCT__entry(
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__field(size_t, bucket )
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__field(unsigned, keys )
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),
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TP_fast_assign(
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__entry->bucket = PTR_BUCKET_NR(b->c, &b->key, 0);
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__entry->keys = keys;
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),
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TP_printk("bucket %zu keys %u", __entry->bucket, __entry->keys)
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);
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DEFINE_EVENT(btree_split, bcache_btree_node_split,
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TP_PROTO(struct btree *b, unsigned keys),
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TP_ARGS(b, keys)
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);
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DEFINE_EVENT(btree_split, bcache_btree_node_compact,
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TP_PROTO(struct btree *b, unsigned keys),
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TP_ARGS(b, keys)
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);
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DEFINE_EVENT(btree_node, bcache_btree_set_root,
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TP_PROTO(struct btree *b),
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TP_ARGS(b)
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);
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TRACE_EVENT(bcache_keyscan,
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TP_PROTO(unsigned nr_found,
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unsigned start_inode, uint64_t start_offset,
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unsigned end_inode, uint64_t end_offset),
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TP_ARGS(nr_found,
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start_inode, start_offset,
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end_inode, end_offset),
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TP_STRUCT__entry(
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__field(__u32, nr_found )
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__field(__u32, start_inode )
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__field(__u64, start_offset )
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__field(__u32, end_inode )
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__field(__u64, end_offset )
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),
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TP_fast_assign(
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__entry->nr_found = nr_found;
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__entry->start_inode = start_inode;
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__entry->start_offset = start_offset;
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__entry->end_inode = end_inode;
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__entry->end_offset = end_offset;
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),
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TP_printk("found %u keys from %u:%llu to %u:%llu", __entry->nr_found,
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__entry->start_inode, __entry->start_offset,
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__entry->end_inode, __entry->end_offset)
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);
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/* Allocator */
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TRACE_EVENT(bcache_alloc_invalidate,
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TP_PROTO(struct cache *ca),
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TP_ARGS(ca),
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TP_STRUCT__entry(
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__field(unsigned, free )
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__field(unsigned, free_inc )
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__field(unsigned, free_inc_size )
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__field(unsigned, unused )
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),
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TP_fast_assign(
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__entry->free = fifo_used(&ca->free[RESERVE_NONE]);
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__entry->free_inc = fifo_used(&ca->free_inc);
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__entry->free_inc_size = ca->free_inc.size;
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__entry->unused = fifo_used(&ca->unused);
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),
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TP_printk("free %u free_inc %u/%u unused %u", __entry->free,
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__entry->free_inc, __entry->free_inc_size, __entry->unused)
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);
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TRACE_EVENT(bcache_alloc_fail,
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TP_PROTO(struct cache *ca, unsigned reserve),
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TP_ARGS(ca, reserve),
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TP_STRUCT__entry(
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__field(unsigned, free )
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__field(unsigned, free_inc )
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__field(unsigned, unused )
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__field(unsigned, blocked )
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),
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TP_fast_assign(
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__entry->free = fifo_used(&ca->free[reserve]);
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__entry->free_inc = fifo_used(&ca->free_inc);
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__entry->unused = fifo_used(&ca->unused);
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__entry->blocked = atomic_read(&ca->set->prio_blocked);
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),
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TP_printk("free %u free_inc %u unused %u blocked %u", __entry->free,
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__entry->free_inc, __entry->unused, __entry->blocked)
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);
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/* Background writeback */
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DEFINE_EVENT(bkey, bcache_writeback,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k)
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);
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DEFINE_EVENT(bkey, bcache_writeback_collision,
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TP_PROTO(struct bkey *k),
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TP_ARGS(k)
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);
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#endif /* _TRACE_BCACHE_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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