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Date: Fri, 13 Jul 2018 11:39:45 +0800 From: Yunlong Song <yunlong.song@...wei.com> To: Chao Yu <yuchao0@...wei.com>, <jaegeuk@...nel.org>, <chao@...nel.org>, <yunlong.song@...oud.com> CC: <miaoxie@...wei.com>, <bintian.wang@...wei.com>, <shengyong1@...wei.com>, <heyunlei@...wei.com>, <linux-f2fs-devel@...ts.sourceforge.net>, <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 4/5] f2fs: disable small discard in lfs mode How about change test_opt(sbi, LFS) to f2fs_sb_has_blkzoned(sbi->sb) in this patch, we apply this patch to zoned block device? On 2018/7/13 11:17, Chao Yu wrote: > On 2018/7/12 23:09, Yunlong Song wrote: >> In lfs mode, it is better to send the discard of the overall section >> each time to avoid missing alignment with flash. > Hmm.. I think LFS mode can be used widely on different kind of device instead of > just on zoned block device, so let's just keep old implementation here. > > Thanks, > >> Signed-off-by: Yunlong Song <yunlong.song@...wei.com> >> --- >> fs/f2fs/segment.c | 3 ++- >> fs/f2fs/sysfs.c | 4 ++++ >> 2 files changed, 6 insertions(+), 1 deletion(-) >> >> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c >> index fd38b61..f6c20e0 100644 >> --- a/fs/f2fs/segment.c >> +++ b/fs/f2fs/segment.c >> @@ -1766,7 +1766,8 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi) >> atomic_set(&dcc->issing_discard, 0); >> atomic_set(&dcc->discard_cmd_cnt, 0); >> dcc->nr_discards = 0; >> - dcc->max_discards = MAIN_SEGS(sbi) << sbi->log_blocks_per_seg; >> + dcc->max_discards = test_opt(sbi, LFS) ? 0 : >> + MAIN_SEGS(sbi) << sbi->log_blocks_per_seg; >> dcc->undiscard_blks = 0; >> dcc->root = RB_ROOT; >> dcc->rbtree_check = false; >> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c >> index 2e7e611..4b6c457 100644 >> --- a/fs/f2fs/sysfs.c >> +++ b/fs/f2fs/sysfs.c >> @@ -271,6 +271,10 @@ static ssize_t __sbi_store(struct f2fs_attr *a, >> return count; >> } >> >> + if (!strcmp(a->attr.name, "max_small_discards") && >> + test_opt(sbi, LFS)) >> + return -EINVAL; >> + >> *ui = t; >> >> if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0) >> > > . > -- Thanks, Yunlong Song
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