Jaegeuk Kim a907f3a68e
f2fs: add a sysfs entry to reclaim POSIX_FADV_NOREUSE pages ...
1. fadvise(fd1, POSIX_FADV_NOREUSE, {0,3});
2. fadvise(fd2, POSIX_FADV_NOREUSE, {1,2});
3. fadvise(fd3, POSIX_FADV_NOREUSE, {3,1});
4. echo 1024 > /sys/fs/f2fs/tuning/reclaim_caches_kb
This gives a way to reclaim file-backed pages by iterating all f2fs mounts until
reclaiming 1MB page cache ranges, registered by #1 , #2 , and #3 .
5. cat /sys/fs/f2fs/tuning/reclaim_caches_kb
-> gives total number of registered file ranges.
Reviewed-by: Chao Yu <chao@kernel.org >
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org >
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