diff options
| author | NeilBrown <neilb@suse.de> | 2010-03-08 06:44:38 +0100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2010-03-16 07:04:24 +0100 |
| commit | 627a2d3c29427637f4c5d31ccc7fcbd8d312cd71 (patch) | |
| tree | f0de68842ca3b47d0152254e60d31cc561009119 /drivers/watchdog/sbc_fitpc2_wdt.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/amit/virtio-console (diff) | |
| download | linux-627a2d3c29427637f4c5d31ccc7fcbd8d312cd71.tar.xz linux-627a2d3c29427637f4c5d31ccc7fcbd8d312cd71.zip | |
md: deal with merge_bvec_fn in component devices better.
If a component device has a merge_bvec_fn then as we never call it
we must ensure we never need to. Currently this is done by setting
max_sector to 1 PAGE, however this does not stop a bio being created
with several sub-page iovecs that would violate the merge_bvec_fn.
So instead set max_segments to 1 and set the segment boundary to the
same as a page boundary to ensure there is only ever one single-page
segment of IO requested at a time.
This can particularly be an issue when 'xen' is used as it is
known to submit multiple small buffers in a single bio.
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/watchdog/sbc_fitpc2_wdt.c')
0 files changed, 0 insertions, 0 deletions