From: Matthew Wilcox <willy@infradead.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: Amir Goldstein <amir73il@gmail.com>,
Sargun Dhillon <sargun@sargun.me>,
Miklos Szeredi <miklos@szeredi.hu>,
Vivek Goyal <vgoyal@redhat.com>,
overlayfs <linux-unionfs@vger.kernel.org>,
Linux FS-devel Mailing List <linux-fsdevel@vger.kernel.org>,
NeilBrown <neilb@suse.com>, Jan Kara <jack@suse.cz>
Subject: Re: [PATCH v3] errseq: split the ERRSEQ_SEEN flag into two new flags
Date: Sat, 19 Dec 2020 15:33:12 +0000 [thread overview]
Message-ID: <20201219153312.GS15600@casper.infradead.org> (raw)
In-Reply-To: <f84f3259d838f132029576b531d81525abd4e1b8.camel@kernel.org>
On Sat, Dec 19, 2020 at 07:53:12AM -0500, Jeff Layton wrote:
> On Sat, 2020-12-19 at 06:13 +0000, Matthew Wilcox wrote:
> > On Thu, Dec 17, 2020 at 10:00:37AM -0500, Jeff Layton wrote:
> > > Overlayfs's volatile mounts want to be able to sample an error for their
> > > own purposes, without preventing a later opener from potentially seeing
> > > the error.
> >
> > umm ... can't they just copy the errseq_t they're interested in, followed
> > by calling errseq_check() later?
> >
>
> They don't want the sampling for the volatile mount to prevent later
> openers from seeing an error that hasn't yet been reported.
That's why they should use errseq_check(), not errseq_check_and_advance()
...
next prev parent reply other threads:[~2020-12-19 15:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-17 15:00 [PATCH v3] errseq: split the ERRSEQ_SEEN flag into two new flags Jeff Layton
2020-12-17 20:35 ` Sargun Dhillon
2020-12-17 21:18 ` Jeff Layton
2020-12-18 23:44 ` Sargun Dhillon
2020-12-19 1:03 ` Jeff Layton
2020-12-19 9:09 ` Amir Goldstein
2020-12-19 6:13 ` Matthew Wilcox
2020-12-19 12:53 ` Jeff Layton
2020-12-19 13:25 ` Jeff Layton
2020-12-19 15:33 ` Matthew Wilcox [this message]
2020-12-19 15:49 ` Jeff Layton
2020-12-19 16:53 ` Matthew Wilcox
2020-12-21 15:14 ` Vivek Goyal
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