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2fdc86901d
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Ingo Molnar 2fdc86901d 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>
2008-08-15 19:17:33 +02:00
..
acpi PCI: disable ASPM per ACPI FADT setting 2008-07-28 14:56:09 -07:00
asm-alpha [PATCH] kill altroot 2008-07-26 20:53:20 -04:00
asm-arm [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
asm-blackfin [PATCH] kill altroot 2008-07-26 20:53:20 -04:00
asm-cris Merge branch 'linus' into core/generic-dma-coherent 2008-07-29 00:07:55 +02:00
asm-frv FRV: Wire up new system calls 2008-08-01 13:03:49 -07:00
asm-generic Make ioctl.h compatible with userland 2008-08-12 16:07:31 -07:00
asm-m32r [PATCH] kill altroot 2008-07-26 20:53:20 -04:00
asm-m68k m68k{,nommu}: Wire up new system calls 2008-08-11 10:37:34 -07:00
asm-mips [MIPS] kgdb: add arch support for the kernel's kgdb core 2008-07-30 21:54:42 +01:00
asm-mn10300 MN10300: Wire up new system calls 2008-08-01 13:03:48 -07:00
asm-parisc [PATCH] kill altroot 2008-07-26 20:53:20 -04:00
asm-um [PATCH] kill altroot 2008-07-26 20:53:20 -04:00
asm-x86 x86: add MAP_STACK mmap flag 2008-08-15 19:17:33 +02:00
asm-xtensa [PATCH] kill altroot 2008-07-26 20:53:20 -04:00
crypto crypto: hash - Add missing top-level functions 2008-08-13 20:08:44 +10:00
drm
keys
linux Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2008-08-13 20:50:10 -07:00
math-emu
media V4L/DVB (8610): Add suspend/resume capabilities to soc_camera. 2008-08-06 06:57:32 -03:00
mtd Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6 2008-07-25 10:40:14 -04:00
net ipv6: Kill unused ip6_prohibit_entry and ip6_blk_hole_entry declarations. 2008-08-13 02:35:39 -07:00
pcmcia
rdma RDMA/cma: Remove padding arrays by using struct sockaddr_storage 2008-08-04 11:02:14 -07:00
rxrpc
scsi Re-introduce "[SCSI] extend the last_sector_bug flag to cover more sectors" 2008-08-05 21:42:21 -07:00
sound ALSA: ASoC: Export dapm_reg_event() fully 2008-07-29 16:00:33 +02:00
video atmel_lcdfb: add board parameter specify framebuffer memory size 2008-08-12 16:07:29 -07:00
xen
Kbuild kbuild: only one call for include/ in make headers_* 2008-07-25 22:11:44 +02:00