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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-02-18 19:50:49 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-13 02:05:50 +0300 |
| commit | 079396270b0f1e98496ef7672dd754bdd42574dc (patch) | |
| tree | d43fd93275089f03879da9315eafb5cf6b90b854 /fs/f2fs/f2fs.h | |
| parent | 69babac019337b35aae5644ccf8089243c749d4c (diff) | |
| download | linux-079396270b0f1e98496ef7672dd754bdd42574dc.tar.xz | |
f2fs: add mount option for segment allocation policy
This patch adds an mount option, "alloc_mode=%s" having two options, "default"
and "reuse".
In "alloc_mode=reuse" case, f2fs starts to allocate segments from 0'th segment
all the time to reassign segments. It'd be useful for small-sized eMMC parts.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 3bb4e943454a..833c9bc06d03 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1043,6 +1043,11 @@ enum { WHINT_MODE_FS, /* pass down hints with F2FS policy */ }; +enum { + ALLOC_MODE_DEFAULT, /* stay default */ + ALLOC_MODE_REUSE, /* reuse segments as much as possible */ +}; + struct f2fs_sb_info { struct super_block *sb; /* pointer to VFS super block */ struct proc_dir_entry *s_proc; /* proc entry */ @@ -1229,6 +1234,9 @@ struct f2fs_sb_info { #endif /* For which write hints are passed down to block layer */ int whint_mode; + + /* segment allocation policy */ + int alloc_mode; }; #ifdef CONFIG_F2FS_FAULT_INJECTION |