From: David Sterba <dsterba@suse.cz>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: dsterba@suse.cz, Qu Wenruo <wqu@suse.com>, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH v4 04/12] btrfs: extent_io: Move the BUG_ON() in flush_write_bio() one level up
Date: Thu, 31 Jan 2019 15:36:37 +0100 [thread overview]
Message-ID: <20190131143637.GF2900@twin.jikos.cz> (raw)
In-Reply-To: <3893155e-d3c3-5fd0-6f61-ae067d341d81@gmx.com>
On Thu, Jan 31, 2019 at 08:45:42AM +0800, Qu Wenruo wrote:
>
>
> On 2019/1/30 下午11:19, David Sterba wrote:
> > On Fri, Jan 25, 2019 at 01:09:17PM +0800, Qu Wenruo wrote:
> >> +static int __must_check flush_write_bio(struct extent_page_data *epd)
> >> {
> >> - if (epd->bio) {
> >> - int ret;
> >> + int ret = 0;
> >>
> >> + if (epd->bio) {
> >> ret = submit_one_bio(epd->bio, 0, 0);
> >> - BUG_ON(ret < 0); /* -ENOMEM */
> >> epd->bio = NULL;
> >
> > I'm not sure if resetting epd->bio to NULL is all that needs to be done
> > here. With the BUG_ON the error case never happens so if all goes fine
> > it's also ok to set it to NULL and continue. But the callers might need
> > to send the flush again.
>
> If flush_write_bio() get called again on the failed one, it will just
> get skipped as epd->bio is NULL, submit_one_bio() will not be triggered.
Yes that's clear, but what is the state of the bio that went to
flush_write_bio and submit_one_bio failed?
next prev parent reply other threads:[~2019-01-31 14:37 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-25 5:09 [PATCH v4 00/12] btrfs: Enhancement to tree block validation Qu Wenruo
2019-01-25 5:09 ` [PATCH v4 01/12] btrfs: Always output error message when key/level verification fails Qu Wenruo
2019-01-25 9:02 ` Johannes Thumshirn
2019-01-25 5:09 ` [PATCH v4 02/12] btrfs: extent_io: Kill the forward declaration of flush_write_bio() Qu Wenruo
2019-01-25 5:09 ` [PATCH v4 03/12] btrfs: disk-io: Show the timing of corrupted tree block explicitly Qu Wenruo
2019-01-25 9:03 ` Johannes Thumshirn
2019-01-30 14:57 ` David Sterba
2019-01-30 14:59 ` Nikolay Borisov
2019-01-31 0:03 ` Qu Wenruo
2019-01-31 14:20 ` David Sterba
2019-01-31 14:22 ` Nikolay Borisov
2019-02-07 17:27 ` David Sterba
2019-01-25 5:09 ` [PATCH v4 04/12] btrfs: extent_io: Move the BUG_ON() in flush_write_bio() one level up Qu Wenruo
2019-01-25 9:04 ` Johannes Thumshirn
2019-01-30 15:08 ` David Sterba
2019-01-30 15:19 ` David Sterba
2019-01-31 0:45 ` Qu Wenruo
2019-01-31 14:36 ` David Sterba [this message]
2019-02-15 7:18 ` Qu Wenruo
2019-02-15 9:58 ` Qu Wenruo
2019-01-25 5:09 ` [PATCH v4 05/12] btrfs: extent_io: Kill the BUG_ON() in extent_write_full_page() Qu Wenruo
2019-01-25 9:05 ` Johannes Thumshirn
2019-01-25 5:09 ` [PATCH v4 06/12] btrfs: extent_io: Kill the BUG_ON() in btree_write_cache_pages() Qu Wenruo
2019-01-25 9:11 ` Johannes Thumshirn
2019-01-25 5:09 ` [PATCH v4 07/12] btrfs: extent_io: Kill the dead branch in extent_write_cache_pages() Qu Wenruo
2019-01-25 9:11 ` Johannes Thumshirn
2019-01-25 5:09 ` [PATCH v4 08/12] btrfs: extent_io: Kill the BUG_ON() in extent_write_locked_range() Qu Wenruo
2019-01-25 5:09 ` [PATCH v4 09/12] btrfs: extent_io: Kill the BUG_ON() in lock_extent_buffer_for_io() Qu Wenruo
2019-01-25 5:09 ` [PATCH v4 10/12] btrfs: extent_io: Kill the BUG_ON() in extent_write_cache_pages() Qu Wenruo
2019-01-25 9:16 ` Johannes Thumshirn
2019-01-25 5:09 ` [PATCH v4 11/12] btrfs: extent_io: Kill the BUG_ON() in extent_writepages() Qu Wenruo
2019-01-25 9:16 ` Johannes Thumshirn
2019-01-25 5:09 ` [PATCH v4 12/12] btrfs: Do mandatory tree block check before submitting bio Qu Wenruo
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=20190131143637.GF2900@twin.jikos.cz \
--to=dsterba@suse.cz \
--cc=linux-btrfs@vger.kernel.org \
--cc=quwenruo.btrfs@gmx.com \
--cc=wqu@suse.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.