linux-kernel - Re: [RFC PATCH 04/10] pipe: Use head and tail pointers for the ring, not cursor and length [ver #2]

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Date:   Sat, 7 Dec 2019 01:00:30 +0100
From:   Johannes Hirte <johannes.hirte@...enkhaos.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     David Howells <dhowells@...hat.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Nicolas Dichtel <nicolas.dichtel@...nd.com>, raven@...maw.net,
        Christian Brauner <christian@...uner.io>,
        keyrings@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-block <linux-block@...r.kernel.org>,
        LSM List <linux-security-module@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 04/10] pipe: Use head and tail pointers for the ring,
 not cursor and length [ver #2]

On 2019 Dez 06, Linus Torvalds wrote:
> On Fri, Dec 6, 2019 at 1:47 PM Johannes Hirte
> <johannes.hirte@...enkhaos.de> wrote:
> >
> > This change breaks firefox on my system. I've noticed that some pages
> > doesn't load correctly anymore (e.g. facebook, spiegel.de). The pages
> > start loading and than stop. Looks like firefox is waiting for some
> > dynamic loading content. I've bisected to this commit, but can't revert
> > because of conflicts.
> 
> Can you check the current git tree, and see if we've fixed it for you.
> There are several fixes there, one being the (currently) topmost
> commit 76f6777c9cc0 ("pipe: Fix iteration end check in
> fuse_dev_splice_write()").
> 
> I _just_ pushed out that one, so check that you get it - it sometimes
> takes a couple of minutes for the public-facing git servers to mirror
> out. I doubt that's the one that would fix firefox, but still..
> 
>                Linus

Tested with 5.4.0-11505-g347f56fb3890 and still the same wrong behavior.
Reliable testcase is facebook, where timeline isn't updated with firefox.

-- 
Regards,
  Johannes Hirte