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| author | Yan, Zheng <zyan@redhat.com> | 2015-09-07 15:46:24 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2015-09-09 09:52:29 +0300 |
| commit | 438386853d4c0c48fe73bf05a7d61c70ca5a3bfb (patch) | |
| tree | b760a610262df0e202e949cbb3b6f71726ff2c38 /fs/ceph | |
| parent | 55b0b31cbc09f80db384671e22cdc94b2aa26b29 (diff) | |
| download | op-kernel-dev-438386853d4c0c48fe73bf05a7d61c70ca5a3bfb.zip op-kernel-dev-438386853d4c0c48fe73bf05a7d61c70ca5a3bfb.tar.gz | |
ceph: improve readahead for file holes
When readahead encounters file holes, osd reply returns error -ENOENT,
finish_read() skips adding pages to the the page cache. So readahead
does not work for file holes. The fix is adding zero pages to the
page cache when -ENOENT is returned.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/addr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 9893335..6471e28 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -276,7 +276,7 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg) for (i = 0; i < num_pages; i++) { struct page *page = osd_data->pages[i]; - if (rc < 0) + if (rc < 0 && rc != ENOENT) goto unlock; if (bytes < (int)PAGE_CACHE_SIZE) { /* zero (remainder of) page */ |
