From: Andrew Morton <akpm@osdl.org>
To: Shailabh Nagar <nagar@watson.ibm.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Patch 2/8] Block I/O, swapin delays
Date: Wed, 29 Mar 2006 21:03:40 -0800 [thread overview]
Message-ID: <20060329210340.570d63e5.akpm@osdl.org> (raw)
In-Reply-To: <442B2836.2020708@watson.ibm.com>
Shailabh Nagar <nagar@watson.ibm.com> wrote:
>
> delayacct-blkio-swapin.patch
>
> Collect per-task block I/O delay statistics.
>
> Unlike earlier iterations of the delay accounting
> patches, now delays are only collected for the actual
> I/O waits rather than try and cover the delays seen in
> I/O submission paths.
>
> Account separately for block I/O delays
> incurred as a result of swapin page faults whose
> frequency can be affected by the task/process' rss limit.
> Hence swapin delays can act as feedback for rss limit changes
> independent of I/O priority changes.
>
> ..
>
> +#define PF_SWAPIN 0x02000000 /* I am doing a swap in */
>
Is there really no sane alternative to doing it this way?
next prev parent reply other threads:[~2006-03-30 5:03 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-30 0:32 [Patch 0/8] per-task delay accounting Shailabh Nagar
2006-03-30 0:35 ` [Patch 1/8] Setup Shailabh Nagar
2006-03-30 5:03 ` Andrew Morton
2006-03-30 15:07 ` Shailabh Nagar
2006-03-30 0:37 ` [Patch 2/8] Block I/O, swapin delays Shailabh Nagar
2006-03-30 5:03 ` Andrew Morton [this message]
2006-03-30 15:21 ` Shailabh Nagar
2006-03-30 0:42 ` [Patch 3/8] cpu delays Shailabh Nagar
2006-03-30 5:03 ` Andrew Morton
2006-03-30 16:01 ` Shailabh Nagar
2006-03-30 16:00 ` Dave Hansen
2006-03-30 16:03 ` Shailabh Nagar
2006-03-30 0:48 ` [Patch 4/8] generic netlink utility functions Shailabh Nagar
2006-03-30 0:52 ` [Patch 5/8] generic netlink interface for delay accounting Shailabh Nagar
2006-03-30 5:04 ` Andrew Morton
2006-03-30 6:10 ` Balbir Singh
2006-03-30 6:26 ` Andrew Morton
2006-03-30 6:29 ` Balbir Singh
2006-03-30 16:24 ` Shailabh Nagar
2006-03-30 0:54 ` [Patch 6/8] virtual cpu run time Shailabh Nagar
2006-03-30 5:04 ` Andrew Morton
2006-03-30 16:10 ` Shailabh Nagar
2006-03-30 0:56 ` [Patch 7/8] proc interface for block I/O delays Shailabh Nagar
2006-03-30 5:04 ` Andrew Morton
2006-03-30 0:59 ` [Patch 8/8] documentation, userspace utility Shailabh Nagar
2006-03-30 5:03 ` [Patch 0/8] per-task delay accounting Andrew Morton
2006-03-30 6:23 ` Balbir Singh
2006-03-30 6:47 ` Andrew Morton
2006-03-30 9:55 ` Paul Jackson
2006-03-30 13:23 ` [Lse-tech] " Dipankar Sarma
2006-03-30 17:23 ` Shailabh Nagar
2006-03-31 2:54 ` Peter Chubb
2006-03-31 5:27 ` Shailabh Nagar
2006-03-31 8:17 ` Peter Chubb
2006-03-31 16:03 ` Shailabh Nagar
[not found] ` <442CCF54.3000501@watson.ibm.com>
2006-03-31 7:31 ` Guillaume Thouvenin
2006-03-31 17:01 ` Shailabh Nagar
[not found] ` <442D8E39.8080606@engr.sgi.com>
[not found] ` <442DED81.5060009@engr.sgi.com>
2006-04-10 17:15 ` Jay Lan
2006-04-10 21:44 ` Shailabh Nagar
2006-04-10 22:33 ` [Lse-tech] " Jay Lan
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