From: Hugh Dickins Date: Fri, 24 Feb 2006 21:04:26 +0000 (-0800) Subject: [PATCH] tmpfs: recommend remount for mpol X-Git-Tag: v2.6.16-rc5~26 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad329b1519c0091806046b0e49ab073ea590dc11;p=linux-2.6 [PATCH] tmpfs: recommend remount for mpol 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/Documentation/filesystems/tmpfs.txt b/Documentation/filesystems/tmpfs.txt index 8a155418c7..1773106976 100644 --- a/Documentation/filesystems/tmpfs.txt +++ b/Documentation/filesystems/tmpfs.txt @@ -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 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 options: