linux/arch
Jeremy Fitzhardinge 1ea0d14e48 x86/i386: Make sure stack-protector segment base is cache aligned
The Intel Optimization Reference Guide says:

	In Intel Atom microarchitecture, the address generation unit
	assumes that the segment base will be 0 by default. Non-zero
	segment base will cause load and store operations to experience
	a delay.
		- If the segment base isn't aligned to a cache line
		  boundary, the max throughput of memory operations is
		  reduced to one [e]very 9 cycles.
	[...]
	Assembly/Compiler Coding Rule 15. (H impact, ML generality)
	For Intel Atom processors, use segments with base set to 0
	whenever possible; avoid non-zero segment base address that is
	not aligned to cache line boundary at all cost.

We can't avoid having a non-zero base for the stack-protector
segment, but we can make it cache-aligned.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: <stable@kernel.org>
LKML-Reference: <4AA01893.6000507@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-03 21:30:51 +02:00
..
alpha mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
arm USB: musb: fix the nop registration for OMAP3EVM 2009-08-07 16:05:13 -07:00
avr32 mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
blackfin blackfin: fix wrong CTS inversion 2009-07-20 16:38:44 -07:00
cris mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
frv mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
h8300 sched: INIT_PREEMPT_COUNT 2009-07-10 14:24:05 -07:00
ia64 arch/ia64/kernel/iosapic: missing test after ioremap() 2009-08-11 14:52:11 -07:00
m32r mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
m68k mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
m68knommu Remove multiple KERN_ prefixes from printk formats 2009-07-08 10:30:03 -07:00
microblaze Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze 2009-07-27 12:18:27 -07:00
mips MIPS: Wire up accept4 syscall. 2009-08-03 17:52:50 +01:00
mn10300 MN10300: includecheck fix: mn10300, pci.h 2009-08-10 08:54:27 -07:00
parisc parisc: Set correct bit in protection flags 2009-08-02 12:36:05 +02:00
powerpc Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-08-10 11:48:51 -07:00
s390 Merge branch 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2009-08-09 14:58:21 -07:00
sh sh: fix i2c init order on ap325rxa V2 2009-08-13 11:43:43 +09:00
sparc mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
um mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
x86 x86/i386: Make sure stack-protector segment base is cache aligned 2009-09-03 21:30:51 +02:00
xtensa mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
.gitignore
Kconfig gcov: add gcov profiling infrastructure 2009-06-18 13:03:57 -07:00