path: root/mm/memory.c
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authorWu Fengguang <fengguang.wu@intel.com>2009-09-29 13:16:20 +0800
committerAndi Kleen <ak@linux.intel.com>2009-10-19 07:28:24 +0200
commite43c3afb367112a5b357f9adfac7817255129c88 (patch)
treeb85f21b23ab3a3c38a37cb192bd9a845e964c501 /mm/memory.c
parentHWPOISON: Add brief hwpoison description to Documentation (diff)
HWPOISON: return early on non-LRU pages
Right now we have some trouble with non atomic access to page flags when locking the page. To plug this hole for now, limit error recovery to LRU pages for now. This could be better fixed by defining a suitable protocol, but let's go this simple way for now This avoids unnecessary races with __set_page_locked() and __SetPageSlab*() and maybe more non-atomic page flag operations. This loses isolated pages which are currently in page reclaim, but these are relatively limited compared to the total memory. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> [AK: new description, bug fixes, cleanups]
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