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| author | Raghavendra G <rgowdapp@redhat.com> | 2017-09-18 16:01:34 +0530 |
|---|---|---|
| committer | Amar Tumballi <amarts@redhat.com> | 2017-12-02 11:46:52 +0000 |
| commit | e785faead91f74dce7c832848f2e8f3f43bd0be5 (patch) | |
| tree | 5b46eb5fc6ee7f434e753021851167a74b9b5cc2 /xlators/cluster/dht/src/dht-layout.c | |
| parent | 5eea1756016c55e4138d582e34d0069744772f72 (diff) | |
cluster/dht: don't overfill the buffer in readdir(p)
Superflous dentries that cannot be fit in the buffer size provided by
kernel are thrown away by fuse-bridge. This means,
* the next readdir(p) seen by readdir-ahead would have an offset of a
dentry returned in a previous readdir(p) response. When readdir-ahead
detects non-monotonic offset it turns itself off which can result in
poor readdir performance.
* readdirp can be cpu-intensive on brick and there is no point to read
all those dentries just to be thrown away by fuse-bridge.
So, the best strategy would be to fill the buffer optimally - neither
overfill nor underfill.
Change-Id: Idb3d85dd4c08fdc4526b2df801d49e69e439ba84
BUG: 1492625
Signed-off-by: Raghavendra G <rgowdapp@redhat.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-layout.c')
0 files changed, 0 insertions, 0 deletions