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| author | Daeho Jeong <[email protected]> | 2021-09-29 18:12:03 +0000 |
|---|---|---|
| committer | Jaegeuk Kim <[email protected]> | 2021-10-26 21:04:30 +0000 |
| commit | 6691d940b0e09dd1564130e7a354d6deaf05d009 (patch) | |
| tree | ae609ea58abdfd7ce7c73e72f82d39226f2de3a9 /drivers/fpga/fpga-bridge.c | |
| parent | f2fs: replace snprintf in show functions with sysfs_emit (diff) | |
| download | kernel-6691d940b0e09dd1564130e7a354d6deaf05d009.tar.gz kernel-6691d940b0e09dd1564130e7a354d6deaf05d009.zip | |
f2fs: introduce fragment allocation mode mount option
Added two options into "mode=" mount option to make it possible for
developers to simulate filesystem fragmentation/after-GC situation
itself. The developers use these modes to understand filesystem
fragmentation/after-GC condition well, and eventually get some
insights to handle them better.
"fragment:segment": f2fs allocates a new segment in ramdom position.
With this, we can simulate the after-GC condition.
"fragment:block" : We can scatter block allocation with
"max_fragment_chunk" and "max_fragment_hole" sysfs
nodes. f2fs will allocate 1..<max_fragment_chunk>
blocks in a chunk and make a hole in the length of
1..<max_fragment_hole> by turns in a newly allocated
free segment. Plus, this mode implicitly enables
"fragment:segment" option for more randomness.
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Daeho Jeong <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions