Messages in this thread | | | Date | Tue, 6 Apr 2010 09:22:07 +0800 | From | Wu Fengguang <> | Subject | Re: [PATCH]vmscan: handle underflow for get_scan_ratio |
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> =================================================================== > >From 52358cbccdfe94e0381974cd6e937bcc6b1c608b Mon Sep 17 00:00:00 2001 > From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> > Date: Fri, 2 Apr 2010 17:13:48 +0900 > Subject: [PATCH] Revert "vmscan: get_scan_ratio() cleanup" > > Shaohua Li reported his tmpfs streaming I/O test can lead to make oom. > The test uses a 6G tmpfs in a system with 3G memory. In the tmpfs, > there are 6 copies of kernel source and the test does kbuild for each > copy. His investigation shows the test has a lot of rotated anon > pages and quite few file pages, so get_scan_ratio calculates percent[0] > (i.e. scanning percent for anon) to be zero. Actually the percent[0] > shoule be a big value, but our calculation round it to zero.
should small :)
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Thanks, Fengguang
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