From: Richard Weinberger <richard@nod.at>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"paul.gortmaker@windriver.com" <paul.gortmaker@windriver.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: swapoff() runs forever
Date: Mon, 09 Apr 2012 12:16:13 +0200 [thread overview]
Message-ID: <4F82B6ED.2010500@nod.at> (raw)
In-Reply-To: <4F82752A.6020206@openvz.org>
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Am 09.04.2012 07:35, schrieb Konstantin Khlebnikov:
> Richard Weinberger wrote:
>> Hi!
>>
>> I'm observing a strange issue (at least on UML) on recent Linux kernels.
>> If swap is being used the swapoff() system call never terminates.
>> To be precise "while ((i = find_next_to_unuse(si, i)) != 0)" in try_to_unuse()
>> never terminates.
>>
>> The affected machine has 256MiB ram and 256MiB swap.
>> If an application uses more than 256MiB memory swap is being used.
>> But after the application terminates the free command still reports that a few
>> MiB are on my swap device and swappoff never terminates.
>
> After last tmpfs changes swapoff can take minutes.
> Or this time it really never terminates?
I've never waited forever. ;-)
Once I've waited for >30 minutes.
I don't think that it's related to tmpfs because it happens
also while shutting down the system after all filesystems have been unmounted.
Thanks,
//richard
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next prev parent reply other threads:[~2012-04-09 10:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-08 20:30 swapoff() runs forever Richard Weinberger
2012-04-09 5:35 ` Konstantin Khlebnikov
2012-04-09 10:16 ` Richard Weinberger [this message]
2012-04-09 18:40 ` Hugh Dickins
2012-04-09 19:43 ` Richard Weinberger
2012-04-11 23:09 ` Richard Weinberger
2012-04-12 6:40 ` Hugh Dickins
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