Paul E. McKenney 5e5bcbb108 fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls ... [ Upstream commit 9f47eb5461aaeb6cb8696f9d11503ae90e4d5cb0 ] Very large I/Os can cause the following RCU CPU stall warning: RIP: 0010:rb_prev+0x8/0x50 Code: 49 89 c0 49 89 d1 48 89 c2 48 89 f8 e9 e5 fd ff ff 4c 89 48 10 c3 4c = 89 06 c3 4c 89 40 10 c3 0f 1f 00 48 8b 0f 48 39 cf 74 38 <48> 8b 47 10 48 85 c0 74 22 48 8b 50 08 48 85 d2 74 0c 48 89 d0 48 RSP: 0018:ffffc9002212bab0 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: ffff888821f93630 RBX: ffff888821f93630 RCX: ffff888821f937e0 RDX: 0000000000000000 RSI: 0000000000102000 RDI: ffff888821f93630 RBP: 0000000000103000 R08: 000000000006c000 R09: 0000000000000238 R10: 0000000000102fff R11: ffffc9002212bac8 R12: 0000000000000001 R13: ffffffffffffffff R14: 0000000000102000 R15: ffff888821f937e0 __lookup_extent_mapping+0xa0/0x110 try_release_extent_mapping+0xdc/0x220 btrfs_releasepage+0x45/0x70 shrink_page_list+0xa39/0xb30 shrink_inactive_list+0x18f/0x3b0 shrink_lruvec+0x38e/0x6b0 shrink_node+0x14d/0x690 do_try_to_free_pages+0xc6/0x3e0 try_to_free_mem_cgroup_pages+0xe6/0x1e0 reclaim_high.constprop.73+0x87/0xc0 mem_cgroup_handle_over_high+0x66/0x150 exit_to_usermode_loop+0x82/0xd0 do_syscall_64+0xd4/0x100 entry_SYSCALL_64_after_hwframe+0x44/0xa9 On a PREEMPT=n kernel, the try_release_extent_mapping() function's "while" loop might run for a very long time on a large I/O. This commit therefore adds a cond_resched() to this loop, providing RCU any needed quiescent states. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-08-19 08:14:50 +02:00
..
9p	9p: avoid attaching writeback_fid on mmap with type PRIVATE	2019-10-11 18:21:13 +02:00
adfs	fs/adfs: super: fix use-after-free bug	2019-08-06 19:06:49 +02:00
affs	affs: fix a memory leak in affs_remount	2020-01-27 14:51:21 +01:00
afs	afs: afs_write_end() should change i_size under the right lock	2020-06-25 15:33:06 +02:00
autofs	autofs: fix a leak in autofs_expire_indirect()	2019-12-13 08:51:01 +01:00
befs
bfs	bfs: add sanity check at bfs_fill_super()	2018-12-01 09:37:27 +01:00
btrfs	fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls	2020-08-19 08:14:50 +02:00
cachefiles	cachefiles: Fix race between read_waiter and read_copier involving op->to_do	2020-06-03 08:19:29 +02:00
ceph	ceph: fix double unlock in handle_cap_export()	2020-05-27 17:37:34 +02:00
cifs	Revert "cifs: Fix the target file was deleted when rename failed."	2020-07-29 10:16:55 +02:00
coda	coda: add error handling for fget	2019-08-06 19:06:51 +02:00
configfs	configfs: fix config_item refcnt leak in configfs_rmdir()	2020-05-27 17:37:32 +02:00
cramfs	Cramfs: fix abad comparison when wrap-arounds occur	2018-11-13 11:08:55 -08:00
crypto	fscrypt: clean up some BUG_ON()s in block encryption/decryption	2019-07-26 09:14:02 +02:00
debugfs	debugfs: fix use-after-free on symlink traversal	2019-05-08 07:21:48 +02:00
devpts	fs/devpts: always delete dcache dentry-s in dput()	2019-03-23 20:09:59 +01:00
dlm	dlm: remove BUG() before panic()	2020-06-25 15:32:56 +02:00
ecryptfs	ecryptfs: replace BUG_ON with error handling code	2020-02-28 16:38:59 +01:00
efivarfs	efivars: Call guid_parse() against guid_t type of variable	2018-07-22 14:13:44 +02:00
efs
exofs	exofs_mount(): fix leaks on failure exits	2019-12-05 09:20:32 +01:00
exportfs	exportfs: fix 'passing zero to ERR_PTR()' warning	2020-01-27 14:50:02 +01:00
ext2	ext2: fix debug reference to ext2_xattr_cache	2020-04-23 10:30:21 +02:00
ext4	ext4: fix direct I/O read error	2020-08-07 09:36:21 +02:00
f2fs	f2fs: report delalloc reserve as non-free in statfs for project quota	2020-06-25 15:32:49 +02:00
fat	fat: don't allow to mount if the FAT length == 0	2020-06-22 09:05:08 +02:00
freevxfs
fscache	fscache: fix race between enablement and dropping of object	2018-12-17 09:24:40 +01:00
fuse	fuse: fix weird page warning	2020-07-29 10:16:46 +02:00
gfs2	gfs2: read-only mounts should grab the sd_freeze_gl glock	2020-07-22 09:32:01 +02:00
hfs	fs/hfs/extent.c: fix array out of bounds read of array extent	2019-12-01 09:17:10 +01:00
hfsplus	hfsplus: fix crash and filesystem corruption when deleting files	2020-04-17 10:48:52 +02:00
hostfs	vfs: discard ATTR_ATTR_FLAG	2018-08-17 16:20:28 -07:00
hpfs	hpfs: remove unnecessary checks on the value of r when assigning error code	2018-08-25 12:42:33 -07:00
hugetlbfs	hugetlb: use same fault hash key for shared and private mappings	2019-05-22 07:37:40 +02:00
isofs	isofs: reject hardware sector size > 2048 bytes	2018-08-21 11:37:41 +02:00
jbd2	jbd2: improve comments about freeing data buffers whose page mapping is NULL	2020-04-21 09:03:06 +02:00
jffs2	jffs2: fix use-after-free on symlink traversal	2019-05-08 07:21:48 +02:00
jfs	jfs: fix bogus variable self-initialization	2020-01-27 14:50:33 +01:00
kernfs	kernfs: fix ino wrap-around detection	2019-12-13 08:52:43 +01:00
lockd	lockd: fix decoding of TEST results	2019-12-13 08:51:59 +01:00
minix
nfs	SUNRPC reverting d03727b248d0 ("NFSv4 fix CLOSE not waiting for direct IO compeletion")	2020-07-29 10:16:46 +02:00
nfs_common
nfsd	nfsd: apply umask on fs without ACL support	2020-07-09 09:37:11 +02:00
nilfs2	nilfs2: fix null pointer dereference at nilfs_segctor_do_construct()	2020-06-22 09:05:03 +02:00
nls
notify	fanotify: fix ignore mask logic for events on child and on dir	2020-06-30 23:17:00 -04:00
ntfs	ntfs: mft: remove VLA usage	2018-08-17 16:20:27 -07:00
ocfs2	ocfs2: fix panic on nfs server over ocfs2	2020-06-30 23:17:17 -04:00
omfs
openpromfs
orangefs	help_next should increase position index	2020-02-24 08:34:53 +01:00
overlayfs	ovl: fix unneeded call to ovl_change_flags()	2020-07-22 09:32:10 +02:00
proc	proc: Use new_inode not new_inode_pseudo	2020-06-22 09:05:06 +02:00
pstore	pstore: pstore_ftrace_seq_next should increase position index	2020-04-17 10:48:47 +02:00
qnx4
qnx6
quota	fs: avoid softlockups in s_inodes iterators	2020-01-12 12:17:20 +01:00
ramfs
reiserfs	reiserfs: prevent NULL pointer dereference in reiserfs_insert_item()	2020-02-24 08:34:52 +01:00
romfs
squashfs	Squashfs: Compute expected length from inode size rather than block length	2018-08-02 09:34:02 -07:00
sysfs	Driver core patches for 4.19-rc1	2018-08-18 11:44:53 -07:00
sysv	sysv: return 'err' instead of 0 in __sysv_write_inode	2018-12-17 09:24:30 +01:00
tracefs	tracefs: Annotate tracefs_ops with __ro_after_init	2018-07-31 11:32:44 -04:00
ubifs	ubifs: remove broken lazytime support	2020-05-27 17:37:30 +02:00
udf	udf: Fix free space reporting for metadata and virtual partitions	2020-02-24 08:34:45 +01:00
ufs	ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour	2019-05-25 18:23:46 +02:00
xfs	xfs: fix missed wakeup on l_flush_wait	2020-08-05 10:06:01 +02:00
aio.c	aio: fix async fsync creds	2020-06-22 09:05:01 +02:00
anon_inodes.c	anon_inode_getfile(): switch to alloc_file_pseudo()	2018-07-12 10:04:27 -04:00
attr.c
bad_inode.c	get rid of 'opened' argument of ->atomic_open() - part 3	2018-07-12 10:04:20 -04:00
binfmt_aout.c
binfmt_elf.c	fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()	2020-06-03 08:19:41 +02:00
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c	fs/binfmt_flat.c: make load_flat_shared_library() work	2019-07-03 13:14:44 +02:00
binfmt_misc.c
binfmt_script.c	exec: load_script: Do not exec truncated interpreter path	2019-11-06 13:05:37 +01:00
block_dev.c	block: Fix use-after-free in blkdev_get()	2020-06-25 15:33:06 +02:00
buffer.c	ext4: use non-movable memory for superblock readahead	2020-04-23 10:30:12 +02:00
char_dev.c	chardev: Avoid potential use-after-free in 'chrdev_open()'	2020-01-14 20:06:57 +01:00
compat.c
compat_binfmt_elf.c
compat_ioctl.c	fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP	2020-01-09 10:19:07 +01:00
coredump.c	coredump: fix crash when umh is disabled	2020-05-14 07:57:21 +02:00
d_path.c
dax.c	dax: pass NOWAIT flag to iomap_apply	2020-03-05 16:42:12 +01:00
dcache.c	dcache: sort the freeing-without-RCU-delay mess for good.	2019-05-25 18:23:26 +02:00
dcookies.c
direct-io.c	direct-io: allow direct writes to empty inodes	2019-03-05 17:58:50 +01:00
drop_caches.c	fs: avoid softlockups in s_inodes iterators	2020-01-12 12:17:20 +01:00
eventfd.c	eventfd: track eventfd_signal() recursion depth	2020-02-11 04:34:08 -08:00
eventpoll.c	fs/epoll: drop ovflist branch prediction	2019-02-12 19:47:19 +01:00
exec.c	exec: Move would_dump into flush_old_exec	2020-05-20 08:18:50 +02:00
fcntl.c	signal: Don't send signals to tasks that don't exist	2018-08-15 23:03:20 -05:00
fhandle.c
file.c	fix multiplication overflow in copy_fdtable()	2020-05-27 17:37:29 +02:00
file_table.c	overlayfs update for 4.19	2018-08-21 18:19:09 -07:00
filesystems.c	fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()	2020-04-17 10:48:51 +02:00
fs-writeback.c	cgroup, blkcg: Prepare some symbols for module and !CONFIG_CGROUP usages	2020-06-22 09:05:03 +02:00
fs_pin.c
fs_struct.c
inode.c	futex: Fix inode life-time issue	2020-03-25 08:06:14 +01:00
internal.h	acct_on(): don't mess with freeze protection	2019-05-31 06:46:05 -07:00
ioctl.c	vfs: fix FIGETBSZ ioctl on an overlayfs file	2018-11-21 09:19:14 +01:00
iomap.c	iomap: partially revert 4721a601099 (simulated directio short read on EFAULT)	2019-12-13 08:52:56 +01:00
Kconfig
Kconfig.binfmt	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
libfs.c	libfs: fix infoleak in simple_attr_read()	2020-04-02 15:28:21 +02:00
locks.c	locks: print unsigned ino in /proc/locks	2020-01-09 10:19:00 +01:00
Makefile
mbcache.c
mount.h
mpage.c	mpage: mpage_readpages() should submit IO as read-ahead	2018-08-17 16:20:29 -07:00
namei.c	namei: only return -ECHILD from follow_dotdot_rcu()	2020-03-05 16:42:20 +01:00
namespace.c	fs/namespace.c: fix mountpoint reference counter race	2020-04-29 16:31:26 +02:00
no-block.c
nsfs.c	dcache: sort the freeing-without-RCU-delay mess for good.	2019-05-25 18:23:26 +02:00
open.c	cifs_atomic_open(): fix double-put on late allocation failure	2020-03-18 07:14:21 +01:00
pipe.c	fs: prevent page refcount overflow in pipe_buf_get	2019-05-04 09:20:11 +02:00
pnode.c	propagate_one(): mnt_set_mountpoint() needs mount_lock	2020-05-02 17:26:01 +02:00
pnode.h
posix_acl.c
proc_namespace.c
read_write.c	vfs: avoid problematic remapping requests into partial EOF block	2019-12-01 09:17:04 +01:00
readdir.c	filldir[64]: remove WARN_ON_ONCE() for bad directory entries	2020-01-04 19:13:26 +01:00
select.c
seq_file.c	seq_file: fix problem when seeking mid-record	2019-08-25 10:47:43 +02:00
signalfd.c
splice.c	splice: only read in as much information as there is pipe buffer space	2019-12-17 20:35:43 +01:00
stack.c
stat.c
statfs.c	vfs: Fix EOVERFLOW testing in put_compat_statfs64	2019-10-11 18:21:39 +02:00
super.c	Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax	2018-08-26 11:48:42 -07:00
sync.c
timerfd.c	Merge branch 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-08-13 20:56:23 -07:00
userfaultfd.c	userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK	2020-01-04 19:13:18 +01:00
utimes.c
xattr.c	xattr: break delegations in {set,remove}xattr	2020-08-11 15:32:34 +02:00