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ceph: set up readahead size when rsize is not passed 

This should improve the default read performance, as without it
readahead is practically disabled.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
This commit is contained in:
Yehuda Sadeh 2011-07-22 11:12:28 -07:00 committed by Sage Weil
parent 79e3057c4c
commit e985222743
1 changed files with 4 additions and 0 deletions
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4
fs/ceph/super.c
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@ -779,6 +779,10 @@ static int ceph_register_bdi(struct super_block *sb,
fsc->backing_dev_info.ra_pages = fsc->backing_dev_info.ra_pages =
(fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1) (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1)
>> PAGE_SHIFT; >> PAGE_SHIFT;
else
fsc->backing_dev_info.ra_pages =
default_backing_dev_info.ra_pages;
err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d", err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
atomic_long_inc_return(&bdi_seq)); atomic_long_inc_return(&bdi_seq));
if (!err) if (!err)