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authorDimitri Sivanich <sivanich@sgi.com>2009-06-23 21:37:04 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-23 21:50:05 +0200
commit364df0ebfbbb1330bfc6ca159f4d6020efc15a12 (patch)
tree80c79bf145d8388ad96a0f7c47a4d25642e403a1 /arch/h8300/Kconfig.cpu
parentrmap: fixup page_referenced() for nommu systems (diff)
downloadlinux-364df0ebfbbb1330bfc6ca159f4d6020efc15a12.tar.xz
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mm: fix handling of pagesets for downed cpus
After downing/upping a cpu, an attempt to set /proc/sys/vm/percpu_pagelist_fraction results in an oops in percpu_pagelist_fraction_sysctl_handler(). If a processor is downed then we need to set the pageset pointer back to the boot pageset. Updates of the high water marks should not access pagesets of unpopulated zones (those pointer go to the boot pagesets which would be no longer functional if their size would be increased beyond zero). Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Signed-off-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Mel Gorman <mel@csn.ul.ie> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/h8300/Kconfig.cpu')
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