From: Matthew Wilcox <willy@infradead.org>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-unionfs@vger.kernel.org, jlayton@kernel.org,
amir73il@gmail.com, sargun@sargun.me, miklos@szeredi.hu,
jack@suse.cz, neilb@suse.com, viro@zeniv.linux.org.uk,
hch@lst.de
Subject: Re: [PATCH 3/3] overlayfs: Report writeback errors on upper
Date: Tue, 22 Dec 2020 16:20:27 +0000 [thread overview]
Message-ID: <20201222162027.GJ874@casper.infradead.org> (raw)
In-Reply-To: <20201221195055.35295-4-vgoyal@redhat.com>
On Mon, Dec 21, 2020 at 02:50:55PM -0500, Vivek Goyal wrote:
> +static int ovl_errseq_check_advance(struct super_block *sb, struct file *file)
> +{
> + struct ovl_fs *ofs = sb->s_fs_info;
> + struct super_block *upper_sb;
> + int ret;
> +
> + if (!ovl_upper_mnt(ofs))
> + return 0;
> +
> + upper_sb = ovl_upper_mnt(ofs)->mnt_sb;
> +
> + if (!errseq_check(&upper_sb->s_wb_err, file->f_sb_err))
> + return 0;
> +
> + /* Something changed, must use slow path */
> + spin_lock(&file->f_lock);
> + ret = errseq_check_and_advance(&upper_sb->s_wb_err, &file->f_sb_err);
> + spin_unlock(&file->f_lock);
Why are you microoptimising syncfs()? Are there really applications which
call syncfs() in a massively parallel manner on the same file descriptor?
next prev parent reply other threads:[~2020-12-22 16:21 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-21 19:50 [RFC PATCH 0/3][v3] vfs, overlayfs: Fix syncfs() to return correct errors Vivek Goyal
2020-12-21 19:50 ` [PATCH 1/3] vfs: Do not ignore return code from s_op->sync_fs Vivek Goyal
2020-12-22 1:23 ` NeilBrown
2020-12-22 15:17 ` Vivek Goyal
2020-12-21 19:50 ` [PATCH 2/3] vfs: Add a super block operation to check for writeback errors Vivek Goyal
2020-12-22 16:19 ` Matthew Wilcox
2020-12-22 16:25 ` Vivek Goyal
2020-12-23 12:44 ` Jeff Layton
2020-12-23 12:48 ` Jeff Layton
2021-01-04 19:41 ` Vivek Goyal
2020-12-21 19:50 ` [PATCH 3/3] overlayfs: Report writeback errors on upper Vivek Goyal
2020-12-22 16:20 ` Matthew Wilcox [this message]
2020-12-22 16:29 ` Vivek Goyal
2020-12-22 17:46 ` Matthew Wilcox
2020-12-22 17:55 ` Vivek Goyal
2020-12-23 12:53 ` Jeff Layton
2020-12-23 18:20 ` Sargun Dhillon
2020-12-23 18:50 ` Matthew Wilcox
2020-12-23 19:29 ` Sargun Dhillon
2020-12-23 20:07 ` Matthew Wilcox
2020-12-23 20:21 ` Sargun Dhillon
2020-12-23 20:44 ` Matthew Wilcox
2020-12-24 9:32 ` Amir Goldstein
2020-12-24 10:12 ` Sargun Dhillon
2020-12-24 12:13 ` Matthew Wilcox
2020-12-25 6:50 ` Amir Goldstein
2020-12-28 13:25 ` Jeff Layton
2020-12-28 15:51 ` Amir Goldstein
2021-01-04 15:51 ` Vivek Goyal
2020-12-28 15:56 ` Matthew Wilcox
2020-12-28 17:26 ` Jeff Layton
2020-12-28 19:25 ` Sargun Dhillon
2020-12-28 19:37 ` Amir Goldstein
2020-12-28 20:48 ` Matthew Wilcox
2021-01-02 13:25 ` Jeff Layton
2021-01-04 16:59 ` Vivek Goyal
2021-01-04 15:14 ` Vivek Goyal
2021-01-04 15:22 ` Amir Goldstein
2021-01-04 15:40 ` Vivek Goyal
2021-01-04 21:42 ` Amir Goldstein
2021-01-04 22:44 ` Vivek Goyal
2021-01-05 7:11 ` Amir Goldstein
2021-01-05 16:26 ` Vivek Goyal
2021-01-05 16:57 ` Amir Goldstein
2020-12-23 19:00 ` Jeff Layton
2021-01-04 20:00 ` Vivek Goyal
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=20201222162027.GJ874@casper.infradead.org \
--to=willy@infradead.org \
--cc=amir73il@gmail.com \
--cc=hch@lst.de \
--cc=jack@suse.cz \
--cc=jlayton@kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-unionfs@vger.kernel.org \
--cc=miklos@szeredi.hu \
--cc=neilb@suse.com \
--cc=sargun@sargun.me \
--cc=vgoyal@redhat.com \
--cc=viro@zeniv.linux.org.uk \
/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).