3 commits

Author	SHA1	Message	Date
Ingo Molnar	cd98a04a59	x86: add MAP_STACK mmap flag ... as per this discussion: http://lkml.org/lkml/2008/8/12/423 Pardo reported that 64-bit threaded apps, if their stacks exceed the combined size of ~4GB, slow down drastically in pthread_create() - because glibc uses MAP_32BIT to allocate the stacks. The use of MAP_32BIT is a legacy hack - to speed up context switching on certain early model 64-bit P4 CPUs. So introduce a new flag to be used by glibc instead, to not constrain 64-bit apps like this. glibc can switch to this new flag straight away - it will be ignored by the kernel. If those old CPUs ever matter to anyone, support for it can be implemented. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Ulrich Drepper <drepper@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2008-08-15 11:45:19 -07:00
Thomas Gleixner	5c8eec5019	x86: unify include/asm/mman_32/64.h ... Same file, except for the extra 64bit MAP_32BIT define, which does not hurt for 32 bit compiles. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>	2007-10-17 20:26:15 +02:00
Thomas Gleixner	96a388de5d	i386/x86_64: move headers to include/asm-x86 ... Move the headers to include/asm-x86 and fixup the header install make rules Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>	2007-10-11 11:20:03 +02:00