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Date: Fri, 06 Apr 2012 04:29:20 +0400 From: Alexey Ivanov <rbtz@...dex-team.ru> To: linux-kernel@...r.kernel.org Subject: mapped pagecache pages vs unmapped pages 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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