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| author | Raghavendra G <rgowdapp@redhat.com> | 2017-09-18 16:01:34 +0530 |
|---|---|---|
| committer | Shyamsundar Ranganathan <srangana@redhat.com> | 2017-12-11 04:55:06 +0000 |
| commit | dd8b4832588bcfcb73a74673bef196b87a7c16d3 (patch) | |
| tree | 61a1552c4ad09158492afbcf6aa0b3bfd15b7078 /doc | |
| parent | af59eedfb8185fefe4cc3d73e88211893da69d51 (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>
(cherry picked from commit e785faead91f74dce7c832848f2e8f3f43bd0be5)
Change-Id: Idb3d85dd4c08fdc4526b2df801d49e69e439ba84
BUG: 1522710
Signed-off-by: Raghavendra G <rgowdapp@redhat.com>
Diffstat (limited to 'doc')
0 files changed, 0 insertions, 0 deletions