linux/arch
Paul Gortmaker 122214428a [ARM] 3911/2: Simplify alloc_thread_info on ARM
Remove ARM local cache of 4 struct thread_info.
Can cause oops under certain circumstances.

Russell indicated the original optimization was
required on older kernels to avoid thread starvation
on memory fragmentation, but may no longer be
required.  I've updated the patch to 19rc4 and
ensured no <config.h> dain-bramage slipped in this
time (sorry about that).

Original description follows:

I was given some test results which pointed to an
Oops in alloc_thread_info (happened 2x), and after
looking at the code, I see that ARM has its own
local cache of 4 struct thread_info. There wasn't
any clear (to me) synchronization between the
alloc_thread_info and the free_thread_info.

I looked over the other arch, and they all simply
allocate them on an as needed basis, so I simplified
the ARM to do the same, based on the other arch
(e.g. PPC) and the folks doing the testing have
indicated that this fixed the oops.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-11-30 15:27:03 +00:00
..
alpha Update for the srm_env driver. 2006-11-07 23:50:37 +01:00
arm [ARM] 3911/2: Simplify alloc_thread_info on ARM 2006-11-30 15:27:03 +00:00
arm26 [PATCH] remove bogus arch-specific syscall exports 2006-10-11 11:17:07 -07:00
avr32 AVR32: Add missing return instruction in __raw_writesb 2006-11-06 14:07:16 +01:00
cris [PATCH] cryptocop: double spin_lock_irqsave() 2006-10-30 12:08:41 -08:00
frv [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00
h8300 [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00
i386 x86: be more careful when walking back the frame pointer chain 2006-11-17 11:14:56 -08:00
ia64 [IA64] a fix towards allmodconfig build 2006-11-16 11:25:12 -08:00
m32r [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00
m68k [PATCH] m68k: consolidate initcall sections 2006-10-29 12:07:41 -08:00
m68knommu [PATCH] m68knommu: fix up for the irq_handler_t changes 2006-11-20 10:16:49 -08:00
mips [MIPS] Do topology_init even on uniprocessor kernels. 2006-11-29 16:21:34 +00:00
parisc [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00
powerpc [POWERPC] Fix ucc_geth of_device discovery on mpc832x 2006-11-22 13:28:21 +11:00
ppc [POWERPC] Make alignment exception always check exception table 2006-11-01 15:16:04 +11:00
s390 [S390] IRQs too early enabled. 2006-11-06 10:49:02 +01:00
sh sh: Titan defconfig update. 2006-10-31 12:53:29 +09:00
sh64 [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00
sparc [SPARC]: Fix robust futex syscalls and wire up migrate_pages. 2006-11-05 16:51:03 -08:00
sparc64 [SPARC]: Fix robust futex syscalls and wire up migrate_pages. 2006-11-05 16:51:03 -08:00
um [PATCH] uml: make execvp safe for our usage 2006-11-25 13:28:34 -08:00
v850 [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00
x86_64 Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-11-28 17:28:41 -08:00
xtensa [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00