Messages in this thread | | | Date | Wed, 17 Dec 2008 20:27:26 +0800 | From | Wu Fengguang <> | Subject | Re: 2.6.28-rc8 big regression in VM |
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On Tue, Dec 16, 2008 at 09:52:19PM +0200, Lukas Hejtmanek wrote: > On Tue, Dec 16, 2008 at 12:59:38PM +0800, Wu Fengguang wrote: > > > > modprobe filecache > > > > free; cp /proc/filecache /tmp/a; > > > > echo 3 > /proc/sys/vm/drop_caches > > > > free; cp /proc/filecache /tmp/b; > > > > > > > > and send me the outputs a and b? > > > > > > unfortunately, it causes an oops (0000 [#1] SMP) in d_path + 0x31/0x110, code > > > 48 85 c0 74 2f <48> 8b 40 30 48 > > > rax = 0x100000001 > > > > > > (it does not save the oops into any log, thus I only wrote down possibly most > > > important clues) > > > > Sorry I made a silly mistake while rebasing the patch to 2.6.28. > > The attached patch works OK here. > > so, here are the files.
Thank you.
It looks like most of cached pages were successfully freed:
247788 => 69856 pages
To get more concrete numbers, could you send more info by running the following commands?
cp /proc/meminfo meminfo-1 cp /proc/vmstat vmstat-1 sync echo 3 > /proc/sys/vm/drop_caches cp /proc/meminfo meminfo-2 cp /proc/vmstat vmstat-2
Thanks, Fengguang
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