Messages in this thread | | | Date | Fri, 24 Mar 2023 09:54:39 -0700 | From | Jaegeuk Kim <> | Subject | Re: [PATCH v1] f2fs: Fix discard bug on zoned block devices with 2MiB zone size |
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On 03/24, Chao Yu wrote: > On 2023/3/24 6:03, Jaegeuk Kim wrote: > > On 03/23, Chao Yu wrote: > > > On 2023/3/13 17:48, Yonggil Song wrote: > > > > When using f2fs on a zoned block device with 2MiB zone size, IO errors > > > > occurs because f2fs tries to write data to a zone that has not been reset. > > > > > > > > The cause is that f2fs tries to discard multiple zones at once. This is > > > > caused by a condition in f2fs_clear_prefree_segments that does not check > > > > for zoned block devices when setting the discard range. This leads to > > > > invalid reset commands and write pointer mismatches. > > > > > > > > This patch fixes the zoned block device with 2MiB zone size to reset one > > > > zone at a time. > > > > > > > > Signed-off-by: Yonggil Song <yonggil.song@samsung.com> > > > > --- > > > > fs/f2fs/segment.c | 3 ++- > > > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c > > > > index acf3d3fa4363..2b6cb6df623b 100644 > > > > --- a/fs/f2fs/segment.c > > > > +++ b/fs/f2fs/segment.c > > > > @@ -1953,7 +1953,8 @@ void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi, > > > > (end - 1) <= cpc->trim_end) > > > > continue; > > > > - if (!f2fs_lfs_mode(sbi) || !__is_large_section(sbi)) { > > > > + if (!f2fs_sb_has_blkzoned(sbi) && > > > > > > Could you please add one line comment here for this change? > > > > This was merged in -dev a while ago. I don't think this would be critical > > to rebase it again. > > Yes, it's not critical, fine to me.
Added:
/* Should cover 2MB zoned device for zone-based reset */
So lucky since I had to rebase to fix other patch. :(
"f2fs: factor out discard_cmd usage from general rb_tree use"
> > Thanks, > > > > > > > > > Otherwise it looks good to me. > > > > > > Thanks, > > > > > > > + (!f2fs_lfs_mode(sbi) || !__is_large_section(sbi))) { > > > > f2fs_issue_discard(sbi, START_BLOCK(sbi, start), > > > > (end - start) << sbi->log_blocks_per_seg); > > > > continue;
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