linux-kernel - Re: [Regression] sshd hangs on close

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Message-Id: <200808302228.58255.rjw@sisk.pl>
Date:	Sat, 30 Aug 2008 22:28:57 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Matthias Urlichs <matthias@...ichs.de>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Regression] sshd hangs on close

[Adding CCs]

On Saturday, 30 of August 2008, Matthias Urlichs wrote:
> "top" sees multiple instances of:
> 
>  6008 root      20 3184 D    0   0:00.06 flush_cpu sshd: root@.../13            
> 
> This is 2.6.27rc5, preemption and tickless turned on, on a 4-CPU machine.
> (OK, two hyperthreaded ones :-P) strace() shows that this happens on the
> last close of its /dev/ptmx file descriptor, which hangs.
> 
> I'll do a bisect early next week unless somebody else identifies a likely
> suspect.
> 


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