This patch introduces a batched trimming feature, which submits split discard commands.
Signed-off-by: Jaegeuk Kim <[email protected]> --- fs/f2fs/f2fs.h | 1 + fs/f2fs/segment.c | 15 ++++++++++----- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index c0b83d6..ec4d16b 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -104,6 +104,7 @@ enum { CP_DISCARD, }; +#define BATCHED_TRIM_SEGMENTS 10 struct cp_control { int reason; __u64 trim_start; diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 31c4e57..6c9c784 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1066,14 +1066,19 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range) end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 : GET_SEGNO(sbi, end); cpc.reason = CP_DISCARD; - cpc.trim_start = start_segno; - cpc.trim_end = end_segno; cpc.trim_minlen = range->minlen >> sbi->log_blocksize; /* do checkpoint to issue discard commands safely */ - mutex_lock(&sbi->gc_mutex); - write_checkpoint(sbi, &cpc); - mutex_unlock(&sbi->gc_mutex); + for (; start_segno <= end_segno; + start_segno += BATCHED_TRIM_SEGMENTS + 1) { + cpc.trim_start = start_segno; + cpc.trim_end = min_t(unsigned int, + start_segno + BATCHED_TRIM_SEGMENTS, end_segno); + + mutex_lock(&sbi->gc_mutex); + write_checkpoint(sbi, &cpc); + mutex_unlock(&sbi->gc_mutex); + } out: range->len = cpc.trimmed << sbi->log_blocksize; return 0; -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
