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| author | Chao Yu <yuchao0@huawei.com> | 2021-05-20 13:51:50 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-06-23 10:09:35 +0200 |
| commit | 6ce19aff0b8cd386860855185c6cd79337fc4d2b (patch) | |
| tree | 437802d6394317335ddcf02d21ff95425d97a200 /fs/f2fs/node.c | |
| parent | f2fs: clean up /sys/fs/f2fs/<disk>/features (diff) | |
| download | linux-6ce19aff0b8cd386860855185c6cd79337fc4d2b.tar.xz linux-6ce19aff0b8cd386860855185c6cd79337fc4d2b.zip | |
f2fs: compress: add compress_inode to cache compressed blocks
Support to use address space of inner inode to cache compressed block,
in order to improve cache hit ratio of random read.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/node.c')
| -rw-r--r-- | fs/f2fs/node.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 3a8f7afa5059..dd611efa8aa4 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -97,6 +97,20 @@ bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type) mem_size = (atomic_read(&dcc->discard_cmd_cnt) * sizeof(struct discard_cmd)) >> PAGE_SHIFT; res = mem_size < (avail_ram * nm_i->ram_thresh / 100); + } else if (type == COMPRESS_PAGE) { +#ifdef CONFIG_F2FS_FS_COMPRESSION + unsigned long free_ram = val.freeram; + + /* + * free memory is lower than watermark or cached page count + * exceed threshold, deny caching compress page. + */ + res = (free_ram > avail_ram * sbi->compress_watermark / 100) && + (COMPRESS_MAPPING(sbi)->nrpages < + free_ram * sbi->compress_percent / 100); +#else + res = false; +#endif } else { if (!sbi->sb->s_bdi->wb.dirty_exceeded) return true; |