From: Alexey Ivanov <rbtz@yandex-team.ru>
To: linux-kernel@vger.kernel.org
Subject: mapped pagecache pages vs unmapped pages
Date: Fri, 06 Apr 2012 04:29:20 +0400 [thread overview]
Message-ID: <37371333672160@webcorp7.yandex-team.ru> (raw)
In progress of migration from FreeBSD to Linux and we found some strange behavior: periodically running tasks (like rsync/p2p deployment) evict mapped pages from memory.
>From my little research I've found following lkml thread:
https://lkml.org/lkml/2008/6/11/278
And more precisely this commit: https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4f98a2fee8acdb4ac84545df98cccecfd130f8db
which along with splitting LRU into "anon" and "file" removed support of reclaim_mapped.
Is there a knob to prioritize mapped memory over unmapped (without modifying all apps to use O_DIRECT/fadvise/madvise or mlocking our data in memory) or at least some way to change proportion of Active(file)/Inactive(file)?
--
Sincerely,
Alexey Ivanov
next reply other threads:[~2012-04-06 0:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-06 0:29 Alexey Ivanov [this message]
2012-04-06 7:16 ` gnehzuil.lzheng
2012-04-09 17:11 ` Alexey Ivanov
2012-04-09 18:14 ` Rik van Riel
2012-04-09 23:50 ` Alexey Ivanov
2012-04-10 0:31 ` Minchan Kim
2012-04-10 0:49 ` Rik van Riel
2012-04-10 1:25 ` Minchan Kim
2012-04-09 18:17 ` Ying Han
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