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| author | Bob Peterson <[email protected]> | 2012-07-19 12:12:40 +0000 |
|---|---|---|
| committer | Steven Whitehouse <[email protected]> | 2012-07-19 13:51:08 +0000 |
| commit | 8e2e00473598dd5379d8408cb974dade000acafc (patch) | |
| tree | 1f7bfdf0d07b6c0315bbd11ffee174742d66a459 /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | GFS2: kernel panic with small gfs2 filesystems - 1 RG (diff) | |
| download | kernel-8e2e00473598dd5379d8408cb974dade000acafc.tar.gz kernel-8e2e00473598dd5379d8408cb974dade000acafc.zip | |
GFS2: Reduce file fragmentation
This patch reduces GFS2 file fragmentation by pre-reserving blocks. The
resulting improved on disk layout greatly speeds up operations in cases
which would have resulted in interlaced allocation of blocks previously.
A typical example of this is 10 parallel dd processes, each writing to a
file in a common dirctory.
The implementation uses an rbtree of reservations attached to each
resource group (and each inode).
Signed-off-by: Bob Peterson <[email protected]>
Signed-off-by: Steven Whitehouse <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
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