Subject: Re: PR/34293 CVS commit: src/sys/dev
To: None <gnats-bugs@NetBSD.org>
From: Michael van Elst <firstname.lastname@example.org>
Date: 09/05/2006 20:21:04
On Tue, Sep 05, 2006 at 12:55:02PM +0000, YAMAMOTO Takashi wrote:
> The following reply was made to PR kern/34293; it has been noted by GNATS.
> From: email@example.com (YAMAMOTO Takashi)
> To: firstname.lastname@example.org
> Cc: gnats-bugs@NetBSD.org, kern-bug-people@NetBSD.org,
> gnats-admin@NetBSD.org, netbsd-bugs@NetBSD.org
> Subject: Re: PR/34293 CVS commit: src/sys/dev
> Date: Tue, 5 Sep 2006 21:53:09 +0900 (JST)
> > > while vndthread is working on behalf of the pagedaemon here,
> > > it is not a pagedaemon. so it can't get special treatment for pagedaemon
> > > from buffer cache etc and can deadlock.
> > In my case it is definitely not working on behalf of the pagedaemon.
> did you have plenty of free memory? it wasn't clear from the PR.
I can't say. At that time the machine was hardly responsive as
all disk I/O was stalled.
> you said "separate pool for nested I/O buffers" worked.
It worked some times. But most times the processes were stuck
waiting on getnewblk.
Michael van Elst
"A potential Snark may lurk in every tree."