From: Nick Piggin <piggin@cyberone.com.au>
To: Andrew Morton <akpm@osdl.org>
Cc: miquels@cistron.nl, axboe@suse.de, linux-lvm@sistina.com,
linux-kernel@vger.kernel.org, thornber@redhat.com
Subject: [linux-lvm] Re: [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests)
Date: Thu Feb 19 20:40:00 2004 [thread overview]
Message-ID: <40356599.3080001@cyberone.com.au> (raw)
In-Reply-To: <20040219172656.77c887cf.akpm@osdl.org>
Andrew Morton wrote:
>Nick Piggin <piggin@cyberone.com.au> wrote:
>
>>Even with this patch, it might still be a good idea to allow
>>pdflush to disregard the limits...
>>
>
>Has it been confirmed that pdflush is blocking in get_request_wait()? I
>guess that can happen very occasionally because we don't bother with any
>locking around there but if it's happening a lot then something is bust.
>
>
Miquel's analysis is pretty plausible, but I'm not sure if
he's confirmed it or not, Miquel? Even if it isn't happening
a lot, and something isn't bust it might be a good idea to
do this.
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <piggin@cyberone.com.au>
To: Andrew Morton <akpm@osdl.org>
Cc: miquels@cistron.nl, axboe@suse.de, linux-lvm@sistina.com,
linux-kernel@vger.kernel.org, thornber@redhat.com
Subject: Re: [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests)
Date: Fri, 20 Feb 2004 12:40:41 +1100 [thread overview]
Message-ID: <40356599.3080001@cyberone.com.au> (raw)
In-Reply-To: <20040219172656.77c887cf.akpm@osdl.org>
Andrew Morton wrote:
>Nick Piggin <piggin@cyberone.com.au> wrote:
>
>>Even with this patch, it might still be a good idea to allow
>>pdflush to disregard the limits...
>>
>
>Has it been confirmed that pdflush is blocking in get_request_wait()? I
>guess that can happen very occasionally because we don't bother with any
>locking around there but if it's happening a lot then something is bust.
>
>
Miquel's analysis is pretty plausible, but I'm not sure if
he's confirmed it or not, Miquel? Even if it isn't happening
a lot, and something isn't bust it might be a good idea to
do this.
next prev parent reply other threads:[~2004-02-20 1:41 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-16 9:11 [linux-lvm] IO scheduler, queue depth, nr_requests Miquel van Smoorenburg
2004-02-16 8:30 ` [linux-lvm] " Jens Axboe
2004-02-16 9:01 ` Joe Thornber
2004-02-16 19:32 ` Kevin P. Fleming
2004-02-17 1:46 ` Kevin P. Fleming
2004-02-18 10:29 ` Miquel van Smoorenburg
2004-02-18 23:52 ` Miquel van Smoorenburg
2004-02-19 8:51 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-19 1:24 ` Nick Piggin
2004-02-19 8:51 ` [linux-lvm] " Nick Piggin
2004-02-19 1:52 ` Miquel van Smoorenburg
2004-02-19 9:00 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-19 2:01 ` Nick Piggin
2004-02-19 9:00 ` [linux-lvm] " Nick Piggin
2004-02-19 1:26 ` Andrew Morton
2004-02-19 8:50 ` [linux-lvm] " Andrew Morton
2004-02-19 2:11 ` Miquel van Smoorenburg
2004-02-19 9:08 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-19 2:26 ` Andrew Morton
2004-02-19 9:08 ` [linux-lvm] " Andrew Morton
2004-02-19 10:15 ` Miquel van Smoorenburg
2004-02-19 10:23 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-19 10:19 ` Jens Axboe
2004-02-19 10:26 ` [linux-lvm] " Jens Axboe
2004-02-19 15:58 ` Miquel van Smoorenburg
2004-02-19 20:59 ` Miquel van Smoorenburg
2004-02-19 17:52 ` [linux-lvm] " Nick Piggin
2004-02-19 22:52 ` Nick Piggin
2004-02-19 18:52 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-19 23:53 ` Miquel van Smoorenburg
2004-02-19 19:15 ` [linux-lvm] " Nick Piggin
2004-02-20 0:15 ` Nick Piggin
2004-02-19 20:16 ` [linux-lvm] [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests) Nick Piggin
2004-02-20 1:12 ` Nick Piggin
2004-02-19 20:25 ` [linux-lvm] " Andrew Morton
2004-02-20 1:26 ` Andrew Morton
2004-02-19 20:40 ` Nick Piggin [this message]
2004-02-20 1:40 ` Nick Piggin
2004-02-19 21:32 ` [linux-lvm] " Andrew Morton
2004-02-20 2:32 ` Andrew Morton
2004-02-20 14:40 ` [PATCH] bdi_congestion_funp (was: Re: [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests)) Miquel van Smoorenburg
2004-02-23 8:41 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-20 9:56 ` [linux-lvm] " Joe Thornber
2004-02-20 14:59 ` Joe Thornber
2004-02-20 9:59 ` [linux-lvm] " Jens Axboe
2004-02-20 15:00 ` Jens Axboe
2004-02-22 14:02 ` Miquel van Smoorenburg
2004-02-23 8:45 ` [linux-lvm] " Miquel van Smoorenburg
2004-02-22 14:55 ` Andrew Morton
2004-02-22 19:55 ` Andrew Morton
2004-02-20 9:57 ` [linux-lvm] " Jens Axboe
2004-02-20 14:57 ` Jens Axboe
2004-02-24 12:54 ` [linux-lvm] Queue congestion: passing down vs passing up [PATCH] Miquel van Smoorenburg
2004-02-19 20:52 ` [linux-lvm] Re: [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests) Nick Piggin
2004-02-20 1:45 ` Nick Piggin
2004-02-19 2:51 ` IO scheduler, queue depth, nr_requests Nick Piggin
2004-02-19 9:11 ` [linux-lvm] " Nick Piggin
2004-02-19 10:21 ` Jens Axboe
2004-02-19 10:26 ` [linux-lvm] " Jens Axboe
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