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| author | Pavel Machek <pavel@ucw.cz> | 2007-10-16 23:31:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:43:06 -0700 |
| commit | 24950898ffd161f2ea67c60f398146457bca8bf0 (patch) | |
| tree | 72cba3a2cc85bfc7c7b5c4eb22342fbd8b77e7c4 | |
| parent | f4e875704d8ebf0323235e635e666432f097ae42 (diff) | |
vm.txt: document min_free_pages as critical for correctness
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>
| -rw-r--r-- | Documentation/sysctl/vm.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index 17346da636e..b89570c3043 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt @@ -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 |