From: Pavel Machek <pavel@ucw.cz>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, Indan Zupancic <indan@nul.nu>,
Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
Daniel Phillips <phillips@google.com>,
Rik van Riel <riel@redhat.com>,
David Miller <davem@davemloft.net>
Subject: Re: [RFC][PATCH 4/4] deadlock prevention for NBD
Date: Thu, 24 Aug 2006 14:43:29 +0000 [thread overview]
Message-ID: <20060824144329.GA4092@ucw.cz> (raw)
In-Reply-To: <20060812141455.30842.41506.sendpatchset@lappy>
Hi!
> Limit each request to 1 page, so that the request throttling also limits the
> number of in-flight pages and force the IO scheduler to NOOP as anything else
> doesn't make sense anyway.
I'd like to understand why it breaks with other schedulers before
merging this. Maybe the failure in NOOP is just harder to trigger?
Pavel
--
Thanks for all the (sleeping) penguins.
WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, Indan Zupancic <indan@nul.nu>,
Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
Daniel Phillips <phillips@google.com>,
Rik van Riel <riel@redhat.com>,
David Miller <davem@davemloft.net>
Subject: Re: [RFC][PATCH 4/4] deadlock prevention for NBD
Date: Thu, 24 Aug 2006 14:43:29 +0000 [thread overview]
Message-ID: <20060824144329.GA4092@ucw.cz> (raw)
In-Reply-To: <20060812141455.30842.41506.sendpatchset@lappy>
Hi!
> Limit each request to 1 page, so that the request throttling also limits the
> number of in-flight pages and force the IO scheduler to NOOP as anything else
> doesn't make sense anyway.
I'd like to understand why it breaks with other schedulers before
merging this. Maybe the failure in NOOP is just harder to trigger?
Pavel
--
Thanks for all the (sleeping) penguins.
--
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next prev parent reply other threads:[~2006-08-24 14:43 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-12 14:14 [RFC][PATCH 0/4] VM deadlock prevention -v4 Peter Zijlstra
2006-08-12 14:14 ` Peter Zijlstra
2006-08-12 14:14 ` [RFC][PATCH 1/4] pfn_to_kaddr() for UML Peter Zijlstra
2006-08-12 14:14 ` Peter Zijlstra
2006-08-12 14:14 ` [RFC][PATCH 2/4] SROG allocator Peter Zijlstra
2006-08-12 14:14 ` Peter Zijlstra
2006-08-12 14:14 ` [RFC][PATCH 3/4] deadlock prevention core Peter Zijlstra
2006-08-12 14:14 ` Peter Zijlstra
2006-08-12 14:41 ` Jeff Garzik
2006-08-12 14:41 ` Jeff Garzik
2006-08-12 15:06 ` rename *MEMALLOC flags (was: Re: [RFC][PATCH 3/4] deadlock prevention core) Peter Zijlstra
2006-08-12 15:06 ` Peter Zijlstra
2006-08-12 15:28 ` Indan Zupancic
2006-08-12 15:28 ` Indan Zupancic
2006-08-12 15:28 ` Indan Zupancic
2006-08-12 15:34 ` Peter Zijlstra
2006-08-12 15:34 ` Peter Zijlstra
2006-08-12 15:34 ` Peter Zijlstra
2006-08-14 0:06 ` rename *MEMALLOC flags Daniel Phillips
2006-08-14 0:06 ` Daniel Phillips
2006-08-14 1:00 ` Paul Jackson
2006-08-14 1:00 ` Paul Jackson
2006-08-14 3:42 ` Nick Piggin
2006-08-14 3:42 ` Nick Piggin
2006-08-12 17:31 ` [RFC][PATCH 3/4] deadlock prevention core Indan Zupancic
2006-08-12 17:31 ` Indan Zupancic
2006-08-12 17:44 ` Peter Zijlstra
2006-08-12 17:44 ` Peter Zijlstra
2006-08-12 17:54 ` Indan Zupancic
2006-08-12 17:54 ` Indan Zupancic
2006-08-12 18:08 ` Peter Zijlstra
2006-08-12 18:08 ` Peter Zijlstra
2006-08-12 18:32 ` Indan Zupancic
2006-08-12 18:32 ` Indan Zupancic
2006-08-12 18:47 ` Peter Zijlstra
2006-08-12 18:47 ` Peter Zijlstra
2006-08-12 19:45 ` Indan Zupancic
2006-08-12 19:45 ` Indan Zupancic
2006-08-12 14:14 ` [RFC][PATCH 4/4] deadlock prevention for NBD Peter Zijlstra
2006-08-12 14:14 ` Peter Zijlstra
2006-08-24 14:43 ` Pavel Machek [this message]
2006-08-24 14:43 ` Pavel Machek
2006-08-12 16:51 ` [RFC][PATCH 0/4] VM deadlock prevention -v4 Indan Zupancic
2006-08-12 16:51 ` Indan Zupancic
2006-08-12 17:33 ` Peter Zijlstra
2006-08-12 17:33 ` Peter Zijlstra
2006-08-12 18:16 ` Indan Zupancic
2006-08-12 18:16 ` Indan Zupancic
2006-08-12 18:54 ` Peter Zijlstra
2006-08-12 18:54 ` Peter Zijlstra
2006-08-12 20:05 ` Indan Zupancic
2006-08-12 20:05 ` Indan Zupancic
2006-08-14 0:42 ` Daniel Phillips
2006-08-14 0:42 ` Daniel Phillips
2006-08-14 5:20 ` Evgeniy Polyakov
2006-08-14 5:20 ` Evgeniy Polyakov
2006-08-14 12:21 ` Rik van Riel
2006-08-14 12:21 ` Rik van Riel
2006-08-14 12:51 ` Herbert Xu
2006-08-14 12:51 ` Herbert Xu
2006-08-14 14:22 ` Rik van Riel
2006-08-14 14:22 ` Rik van Riel
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