Revision 6d2144d355d2a532e5cc3fc12a6ba2a8d4ef15e4 authored by Joe Korty on 05 March 2008, 23:04:59 UTC, committed by Christoph Lameter on 07 March 2008, 00:21:50 UTC
NUMA slab allocator cpu migration bugfix The NUMA slab allocator (specifically, cache_alloc_refill) is not refreshing its local copies of what cpu and what numa node it is on, when it drops and reacquires the irq block that it inherited from its caller. As a result those values become invalid if an attempt to migrate the process to another numa node occured while the irq block had been dropped. The solution is to make cache_alloc_refill reload these variables whenever it drops and reacquires the irq block. The error is very difficult to hit. When it does occur, one gets the following oops + stack traceback bits in check_spinlock_acquired: kernel BUG at mm/slab.c:2417 cache_alloc_refill+0xe6 kmem_cache_alloc+0xd0 ... This patch was developed against 2.6.23, ported to and compiled-tested only against 2.6.25-rc4. Signed-off-by: Joe Korty <joe.korty@ccur.com> Signed-off-by: Christoph Lameter <clameter@sgi.com>
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File | Mode | Size |
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Documentation | ||
arch | ||
block | ||
crypto | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 644 bytes |
.mailmap | -rw-r--r-- | 3.6 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 90.4 KB |
Kbuild | -rw-r--r-- | 1.6 KB |
MAINTAINERS | -rw-r--r-- | 95.1 KB |
Makefile | -rw-r--r-- | 52.8 KB |
README | -rw-r--r-- | 16.5 KB |
REPORTING-BUGS | -rw-r--r-- | 3.1 KB |
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