From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Nigel Cunningham <nigel@suspend2.net>
Cc: linux-kernel@vger.kernel.org, Pavel Machek <pavel@suse.cz>
Subject: Re: [ 00/23] [Suspend2] Freezer Upgrade Patches
Date: Fri, 27 Jan 2006 00:10:22 +0100 [thread overview]
Message-ID: <200601270010.22702.rjw@sisk.pl> (raw)
In-Reply-To: <20060126034518.3178.55397.stgit@localhost.localdomain>
Hi,
On Thursday, 26 January 2006 04:45, Nigel Cunningham wrote:
> Hi everyone.
>
> This set of patches represents the freezer upgrade patches from Suspend2.
>
> The key features of this changeset are:
>
> - Use of Christoph Lameter's todo list notifiers, which help with SMP
> cleanness.
> - Splitting the freezing of kernel and userspace processes. Freezing
> currently suffers from a race because userspace processes can be
> submitting work for kernel threads, thereby stopping them from
> responding to freeze messages in a timely manner. The freezer can
> thus give up when it doesn't really need to. (This is not normally
> a problem only because load is not usually high).
Could you please describe specific situation?
> - The use of bdev freezing to ensure filesystems are properly frozen,
> thereby increasing the integrity of on-disk data in the case where
> a resume doesn't occur. This is also helpful in the case of Suspend2,
> where we don't atomically copy all memory, instead writing LRU pages
> separately.
Is this also needed when we do atomically copy all memory?
Greetings,
Rafael
next prev parent reply other threads:[~2006-01-26 23:16 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-26 3:45 [ 00/23] [Suspend2] Freezer Upgrade Patches Nigel Cunningham
2006-01-26 3:45 ` [ 01/23] [Suspend2] Make workqueues freezeable Nigel Cunningham
2006-01-26 23:17 ` Rafael J. Wysocki
2006-01-27 4:01 ` Nigel Cunningham
2006-01-26 3:45 ` [ 02/23] [Suspend2] Add new include/linux/freezer.h header Nigel Cunningham
2006-01-26 3:45 ` [ 03/23] [Suspend2] Allow a notifier to remove itself from the notifier list Nigel Cunningham
2006-01-26 3:45 ` [ 04/23] [Suspend2] Todo notifier for processes Nigel Cunningham
2006-01-26 3:45 ` [ 05/23] [Suspend2] Make the freezer use todo lists Nigel Cunningham
2006-01-26 3:45 ` [ 06/23] [Suspend2] Disable usermode helper invocations when the freezer is on Nigel Cunningham
2006-01-30 22:05 ` Rafael J. Wysocki
2006-01-31 3:24 ` Nigel Cunningham
2006-01-31 10:58 ` Rafael J. Wysocki
2006-01-31 23:21 ` Nigel Cunningham
2006-02-01 0:33 ` Rafael J. Wysocki
2006-01-26 3:45 ` [ 07/23] [Suspend2] Add which-to-thaw parameter to thaw_processes() calls Nigel Cunningham
2006-01-26 3:45 ` [ 08/23] [Suspend2] New freezer explanation for kernel/power/process.c Nigel Cunningham
2006-01-26 3:45 ` [ 09/23] [Suspend2] Quieten the freezer for normal operation Nigel Cunningham
2006-01-26 3:45 ` [ 10/23] [Suspend2] Add support for freezing filesystem bdevs Nigel Cunningham
2006-01-26 3:45 ` [ 11/23] [Suspend2] Modify freezeable for freezing kernel threads separately Nigel Cunningham
2006-01-26 3:45 ` [ 12/23] [Suspend2] Split freezing of threads according to whether user/kernelspace Nigel Cunningham
2006-01-26 3:45 ` [ 13/23] [Suspend2] Add support for thawing just kernel threads or all threads Nigel Cunningham
2006-01-26 3:45 ` [ 14/23] [Suspend2] Helper for counting freezeable threads of a type Nigel Cunningham
2006-01-26 3:45 ` [ 15/23] [Suspend2] Helper for counting uninterruptible " Nigel Cunningham
2006-01-30 22:18 ` Rafael J. Wysocki
2006-01-30 22:25 ` Pavel Machek
2006-01-31 0:02 ` Rafael J. Wysocki
2006-01-31 9:27 ` [RFC/RFT] finally solve "swsusp fails with mysqld" problem Pavel Machek
2006-01-31 16:17 ` Rafael J. Wysocki
2006-01-31 21:29 ` Pavel Machek
2006-01-31 22:30 ` Rafael J. Wysocki
2006-01-31 5:42 ` [ 15/23] [Suspend2] Helper for counting uninterruptible threads of a type Nigel Cunningham
2006-01-26 3:45 ` [ 16/23] [Suspend2] Helper to signal all " Nigel Cunningham
2006-01-26 3:46 ` [ 17/23] [Suspend2] Helper to prod processes that should have frozen but haven't Nigel Cunningham
2006-01-26 3:46 ` [ 18/23] [Suspend2] Helper: Did we fail to freeze all threads of a type? Nigel Cunningham
2006-01-26 3:46 ` [ 19/23] [Suspend2] Freeze all threads of a type Nigel Cunningham
2006-01-26 3:46 ` [ 20/23] [Suspend2] Modify process.c includes and export freezer state Nigel Cunningham
2006-01-26 3:46 ` [ 21/23] [Suspend2] Remove unused DEBUG undef Nigel Cunningham
2006-01-26 3:46 ` [ 22/23] [Suspend2] Modify swsusp to thaw kernel threads while eating memory Nigel Cunningham
2006-01-26 3:46 ` [ 23/23] [Suspend2] Don't scan LRU while freezer is on Nigel Cunningham
2006-01-26 11:55 ` [ 00/23] [Suspend2] Freezer Upgrade Patches Pavel Machek
2006-01-26 21:49 ` Nigel Cunningham
2006-01-26 23:10 ` Rafael J. Wysocki [this message]
2006-01-27 4:04 ` Nigel Cunningham
2006-01-27 12:18 ` Rafael J. Wysocki
2006-01-27 19:20 ` Nigel Cunningham
2006-01-27 23:22 ` Pavel Machek
2006-01-30 5:54 ` Nigel Cunningham
2006-01-30 11:50 ` Pavel Machek
2006-01-30 7:53 ` Stefan Seyfried
2006-01-30 11:53 ` Rafael J. Wysocki
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