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| author | Eric Sandeen <sandeen@redhat.com> | 2008-07-28 15:46:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-28 16:30:21 -0700 |
| commit | 7fcba054373d5dfc43d26e243a5c9b92069972ee (patch) | |
| tree | 3503fba122a654946b5455bc95fa3978cbc4f68b /scripts/genksyms/parse.h_shipped | |
| parent | 25947d5ac56004378d8c2d31ebf22600d5bc0c02 (diff) | |
| download | blackbird-obmc-linux-7fcba054373d5dfc43d26e243a5c9b92069972ee.tar.gz blackbird-obmc-linux-7fcba054373d5dfc43d26e243a5c9b92069972ee.zip | |
eCryptfs: use page_alloc not kmalloc to get a page of memory
With SLUB debugging turned on in 2.6.26, I was getting memory corruption
when testing eCryptfs. The root cause turned out to be that eCryptfs was
doing kmalloc(PAGE_CACHE_SIZE); virt_to_page() and treating that as a nice
page-aligned chunk of memory. But at least with SLUB debugging on, this
is not always true, and the page we get from virt_to_page does not
necessarily match the PAGE_CACHE_SIZE worth of memory we got from kmalloc.
My simple testcase was 2 loops doing "rm -f fileX; cp /tmp/fileX ." for 2
different multi-megabyte files. With this change I no longer see the
corruption.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Michael Halcrow <mhalcrow@us.ibm.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/genksyms/parse.h_shipped')
0 files changed, 0 insertions, 0 deletions
