Messages in this thread | | | Subject | Re: [f2fs-dev] [PATCH 6/7] f2fs: flush quota blocks after turnning it off | From | Chao Yu <> | Date | Wed, 13 Feb 2019 11:27:25 +0800 |
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On 2019/2/5 0:59, Jaegeuk Kim wrote: > On 02/02, Chao Yu wrote: >> On 2019-1-29 7:47, Jaegeuk Kim wrote: >>> After quota_off, we'll get some dirty blocks. If put_super don't have a chance >>> to flush them by checkpoint, it causes NULL pointer exception in end_io after >>> iput(node_inode). (e.g., by checkpoint=disable) >>> >>> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> >>> --- >>> fs/f2fs/super.c | 6 ++++++ >>> 1 file changed, 6 insertions(+) >>> >>> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c >>> index 5e1f8573a17f..7694cb350734 100644 >>> --- a/fs/f2fs/super.c >>> +++ b/fs/f2fs/super.c >>> @@ -2026,6 +2026,12 @@ void f2fs_quota_off_umount(struct super_block *sb) >>> set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR); >>> } >>> } >>> + /* >>> + * In case of checkpoint=disable, we must flush quota blocks. >> >> checkpoint=disable is one of the cases, right? e.g. IO error can be another case? >> >> So here I guess we need to change the comments a bit for that. > > I didn't test other cases, but checkpoint=disable could give real errors through > some tests. So, basically, I'd like to keep known cases only here.
Alright, not a big deal. :)
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Thanks,
> >> >> Thanks, >> >>> + * This can cause NULL exception for node_inode in end_io, since >>> + * put_super already dropped it. >>> + */ >>> + sync_filesystem(sb); >>> } >>> >>> static void f2fs_truncate_quota_inode_pages(struct super_block *sb) >>> > > > _______________________________________________ > Linux-f2fs-devel mailing list > Linux-f2fs-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel > >
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