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vm.txt: document min_free_pages as critical for correctness

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min_free_pages is critical for correctness, document it as such.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pavel Machek 2007-10-16 23:31:28 -07:00 committed by Linus Torvalds
parent f4e875704d
commit 24950898ff
1 changed files with 6 additions and 0 deletions
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6
Documentation/sysctl/vm.txt
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@ -112,6 +112,12 @@ of kilobytes free. The VM uses this number to compute a pages_min
value for each lowmem zone in the system. Each lowmem zone gets
a number of reserved free pages based proportionally on its size.
Some minimal ammount of memory is needed to satisfy PF_MEMALLOC
allocations; if you set this to lower than 1024KB, your system will
become subtly broken, and prone to deadlock under high loads.
Setting this too high will OOM your machine instantly.
==============================================================
percpu_pagelist_fraction