linux-kernel - Re: tty breakage in X (Was: tty vs workqueue oddities)

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Message-ID: <m2pqmwpolo.fsf@igel.home>
Date:	Thu, 02 Jun 2011 11:30:27 +0200
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: tty breakage in X (Was: tty vs workqueue oddities)

Benjamin Herrenschmidt <benh@...nel.crashing.org> writes:

> It looks like the patch is causing some major malfunctions of the X
> server for me, possibly related to PTYs. For example, cat'ing a large
> file in a gnome terminal hangs the kernel for -minutes- in a loop of
> what looks like flush_to_ldisc/workqueue code, (some ftrace data in the
> quoted bits further down). 

Btw., do you already have d72bce0 ("rcu: Cure load woes")?  Although
that is about an independent bug, it appears to amplify this issue a
lot.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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