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| author | Mel Gorman | 2009-06-17 00:33:04 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2009-06-17 04:47:44 +0200 |
| commit | 608e8e66a154cbc3d591a59dcebfd9cbc9e3431a (patch) | |
| tree | 460c5ff888d0305d875049fbb6117c34d1c5df7a /mm/vmscan.c | |
| parent | mm cleanup: shmem_file_setup: 'char *' -> 'const char *' for name argument (diff) | |
| download | kernel-qcow2-linux-608e8e66a154cbc3d591a59dcebfd9cbc9e3431a.tar.gz kernel-qcow2-linux-608e8e66a154cbc3d591a59dcebfd9cbc9e3431a.tar.xz kernel-qcow2-linux-608e8e66a154cbc3d591a59dcebfd9cbc9e3431a.zip | |
mm: add a gfp-translate script to help understand page allocation failure reports
The page allocation failure messages include a line that looks like
page allocation failure. order:1, mode:0x4020
The mode is easy to translate but irritating for the lazy and a bit error
prone. This patch adds a very simple helper script gfp-translate for the
mode: portion of the page allocation failure messages. An example usage
looks like
mel@machina:~/linux-2.6 $ scripts/gfp-translate 0x4020
Source: /home/mel/linux-2.6
Parsing: 0x4020
#define __GFP_HIGH (0x20) /* Should access emergency pools? */
#define __GFP_COMP (0x4000) /* Add compound page metadata */
The script is not a work of art but it has come in handy for me a few
times so I thought I would share.
[akpm@linux-foundation.org: clarify an error message]
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
0 files changed, 0 insertions, 0 deletions