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[PATCH] tmpfs: recommend remount for mpol

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akpm points out that switching to a non-NUMA kernel could be irritating
if mounting tmpfs fails on an mpol option: tmpfs.txt recommend remount.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2006-02-24 13:04:26 -08:00 committed by Linus Torvalds
parent 63d94e482d
commit ad329b1519
1 changed files with 9 additions and 0 deletions
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9
Documentation/filesystems/tmpfs.txt
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@ -92,6 +92,15 @@ NodeList format is a comma-separated list of decimal numbers and ranges,
a range being two hyphen-separated decimal numbers, the smallest and a range being two hyphen-separated decimal numbers, the smallest and
largest node numbers in the range. For example, mpol=bind:0-3,5,7,9-15 largest node numbers in the range. For example, mpol=bind:0-3,5,7,9-15
Note that trying to mount a tmpfs with an mpol option will fail if the
running kernel does not support NUMA; and will fail if its nodelist
specifies a node >= MAX_NUMNODES. If your system relies on that tmpfs
being mounted, but from time to time runs a kernel built without NUMA
capability (perhaps a safe recovery kernel), or configured to support
fewer nodes, then it is advisable to omit the mpol option from automatic
mount options. It can be added later, when the tmpfs is already mounted
on MountPoint, by 'mount -o remount,mpol=Policy:NodeList MountPoint'.
To specify the initial root directory you can use the following mount To specify the initial root directory you can use the following mount
options: options: