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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-01-26 17:41:23 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-02-11 17:04:44 -0800 |
| commit | bba681cbb231920a786cd7303462fb2632af6f36 (patch) | |
| tree | 9937a96f18dec591769f0fc677587148c24fac9e /fs/f2fs/f2fs.h | |
| parent | 487261f39bcd8983f55c611e299f70f34659674b (diff) | |
| download | linux-bba681cbb231920a786cd7303462fb2632af6f36.tar.gz linux-bba681cbb231920a786cd7303462fb2632af6f36.tar.bz2 linux-bba681cbb231920a786cd7303462fb2632af6f36.zip | |
f2fs: introduce a batched trim
This patch introduces a batched trimming feature, which submits split discard
commands.
This is to avoid long latency due to huge trim commands.
If fstrim was triggered ranging from 0 to the end of device, we should lock
all the checkpoint-related mutexes, resulting in very long latency.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index db1ff55de0bc..337204dfc5cd 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -105,6 +105,10 @@ enum { CP_DISCARD, }; +#define DEF_BATCHED_TRIM_SECTIONS 32 +#define BATCHED_TRIM_SEGMENTS(sbi) \ + (SM_I(sbi)->trim_sections * (sbi)->segs_per_sec) + struct cp_control { int reason; __u64 trim_start; @@ -448,6 +452,9 @@ struct f2fs_sm_info { int nr_discards; /* # of discards in the list */ int max_discards; /* max. discards to be issued */ + /* for batched trimming */ + unsigned int trim_sections; /* # of sections to trim */ + struct list_head sit_entry_set; /* sit entry set list */ unsigned int ipu_policy; /* in-place-update policy */ |