From: Andrew Morton <akpm@linux-foundation.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: renton@renton.name, linux-kernel@vger.kernel.org
Subject: Re: devpts mounts too slowly
Date: Tue, 9 Jun 2009 16:19:45 -0700 [thread overview]
Message-ID: <20090609161945.811cc01f.akpm@linux-foundation.org> (raw)
In-Reply-To: <4A26EB18.6060907@zytor.com>
On Wed, 03 Jun 2009 14:28:56 -0700
"H. Peter Anvin" <hpa@zytor.com> wrote:
> Alexey Vlasov wrote:
> > Hi.
> >
> > In comparison with bind/proc mounting it takes a lot more time mounting
> > devpts. Is it possible to somehow accelerate the process? Now there are
> > about 5k devpts mounting, it already took 20 minutes, further will take
> > even more time.
> >
> > # time mount -n -i -t devpts none /home/staff/.server-1/dev/pts
> > real 0m0.295s
> > user 0m0.000s
> > sys 0m0.288s
> >
>
> A profile would be handy here. There is no sensible reason for this to
> that 0.3 seconds. This might be RCU-epoch related?
>
It seems OK here.
akpm2:/home/akpm/xx# time mount -n -i -t devpts none /tmp/pts
mount -n -i -t devpts none /tmp/pts 0.00s user 0.00s system 0% cpu 0.002 total
next prev parent reply other threads:[~2009-06-09 23:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-03 14:28 devpts mounts too slowly Alexey Vlasov
2009-06-03 21:28 ` H. Peter Anvin
2009-06-09 23:19 ` Andrew Morton [this message]
2009-06-09 23:30 ` Ray Lee
2009-06-09 23:53 ` Andrew Morton
2009-06-10 0:07 ` H. Peter Anvin
2009-06-10 20:51 ` H. Peter Anvin
2009-06-24 20:01 ` Al Viro
2009-06-24 21:58 ` Andrew Morton
2009-06-24 23:02 ` H. Peter Anvin
2009-06-10 0:02 ` H. Peter Anvin
2009-07-06 19:52 ` Alexey Vlasov
2009-07-06 20:03 ` Alexey Vlasov
2009-07-06 21:21 ` H. Peter Anvin
2009-07-07 8:38 ` Alexey Vlasov
2009-07-07 15:37 ` H. Peter Anvin
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