From: David Sterba <dsterba@suse.cz>
To: Ira Weiny <ira.weiny@intel.com>
Cc: dsterba@suse.cz, clm@fb.com, josef@toxicpanda.com,
dsterba@suse.com, Miao Xie <miaox@cn.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing
Date: Fri, 5 Feb 2021 16:34:41 +0100 [thread overview]
Message-ID: <20210205153441.GK1993@twin.jikos.cz> (raw)
In-Reply-To: <20210205035236.GB5033@iweiny-DESK2.sc.intel.com>
On Thu, Feb 04, 2021 at 07:52:36PM -0800, Ira Weiny wrote:
> On Thu, Feb 04, 2021 at 04:26:08PM +0100, David Sterba wrote:
> > On Wed, Feb 03, 2021 at 04:56:48PM +0100, David Sterba wrote:
> > > On Wed, Jan 27, 2021 at 10:15:03PM -0800, ira.weiny@intel.com wrote:
> > > > From: Ira Weiny <ira.weiny@intel.com>
> > > Changelog is good, thanks. I've added stable tags as the missing unmap
> > > is a potential problem.
> >
> > There are lots of tests faling, stack traces like below. I haven't seen
> > anything obvious in the patch so that needs a closer look and for the
> > time being I can't add the patch to for-next.
>
> :-(
>
> I think I may have been off by 1 on the raid6 kmap...
>
> Something like this should fix it...
>
> diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
> index b8a39dad0f00..dbf52f1a379d 100644
> --- a/fs/btrfs/raid56.c
> +++ b/fs/btrfs/raid56.c
> @@ -2370,7 +2370,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
> goto cleanup;
> }
> SetPageUptodate(q_page);
> - pointers[rbio->real_stripes] = kmap(q_page);
> + pointers[rbio->real_stripes - 1] = kmap(q_page);
Oh right and tests agree it works.
> }
>
> atomic_set(&rbio->error, 0);
>
> Let me roll a new version.
No need to, I'll fold the fixup. Thanks.
next prev parent reply other threads:[~2021-02-05 23:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 6:15 [PATCH] fs/btrfs: Fix raid6 qstripe kmap'ing ira.weiny
2021-02-03 15:56 ` David Sterba
2021-02-04 15:26 ` David Sterba
2021-02-05 3:52 ` Ira Weiny
2021-02-05 15:34 ` David Sterba [this message]
2021-02-05 16:39 ` Ira Weiny
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210205153441.GK1993@twin.jikos.cz \
--to=dsterba@suse.cz \
--cc=clm@fb.com \
--cc=dsterba@suse.com \
--cc=ira.weiny@intel.com \
--cc=josef@toxicpanda.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=miaox@cn.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).