Re: 2.6.31-rc5: Reported regressions from 2.6.30

Rafael J. Wysocki
2009-08-03T16:09:58Z

On Monday 03 August 2009, Johannes Weiner wrote:
> On Sun, Aug 02, 2009 at 03:22:01PM -0700, Linus Torvalds wrote:
>
> > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13815
> > > Subject : emacs -nw compilation doesn't show the error message
> > > Submitter : Aneesh Kumar K.V <aneesh.kumar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> > > Date : 2009-07-23 06:22 (11 days old)
> > > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d945cb9cce20ac7143c2de8d88b187f62db99bdc
> >
> > Same old pty bug, same fix: commit e043e42bdb.
> >
> > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13813
> > > Subject : Hangups in n_tty_read()
> > > Submitter : Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
> > > Date : 2009-07-16 18:48 (18 days old)
> > > References : http://marc.info/?l=linux-kernel&m=124777019920579&w=4
> >
> > Hmm. Worth testing that same fix, although the symptoms here are not
> > exactly the same.
>
> Hm, I had no debugging enabled, but I think a silent hang in
>
> pty_write()
> tty_flip_buffer_push()
> flush_to_ldisc()
>
> can cause the receiving side
>
> tty_read()
> n_tty_read()
>
> to wait forever for updates. I haven't looked closely. It seems to
> be gone with your latest master in any case.

Thanks, closed (in fact I closed it earlier already).

Rafael