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Re: [PATCH 05/10] Reduce per table entry overhead by 4 bytes
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From: Pekka Enberg
Subject:
Re: [PATCH 05/10] Reduce per table entry overhead by 4 bytes
Date: Monday, August 9, 2010 - 11:59 am
On Mon, Aug 9, 2010 at 8:26 PM, Nitin Gupta <ngupta@vflare.org> wrote:
quoted text
> Each zram device maintains an array (table) that maps > index within the device to the location of corresponding > compressed chunk. Currently we store 'struct page' pointer, > offset with page and various flags separately which takes > 12 bytes per table entry. Now all these are encoded in a > single 'phys_add_t' value which results in savings of 4 bytes > per entry (except on PAE systems). > > Unfortunately, cleanups related to some variable renames > were mixed in this patch. So, please bear some additional > noise.
The noise makes this patch pretty difficult to review properly. Care to spilt the patch into two pieces? --
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Messages in current thread:
[PATCH 00/10] zram: various improvements and cleanups
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 01/10] Replace ioctls with sysfs interface
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 02/10] Remove need for explicit device initialization
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 03/10] Use percpu stats
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 04/10] Use percpu buffers
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 05/10] Reduce per table entry overhead by 4 bytes
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 06/10] Block discard support
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 07/10] Increase compressed page size threshold
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 08/10] Some cleanups
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 09/10] Update zram documentation
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
[PATCH 10/10] Document sysfs entries
, Nitin Gupta
, (Mon Aug 9, 10:26 am)
Re: [PATCH 07/10] Increase compressed page size threshold
, Pekka Enberg
, (Mon Aug 9, 11:32 am)
Re: [PATCH 01/10] Replace ioctls with sysfs interface
, Pekka Enberg
, (Mon Aug 9, 11:34 am)
Re: [PATCH 02/10] Remove need for explicit device initiali ...
, Pekka Enberg
, (Mon Aug 9, 11:36 am)
Re: [PATCH 03/10] Use percpu stats
, Pekka Enberg
, (Mon Aug 9, 11:44 am)
Re: [PATCH 04/10] Use percpu buffers
, Pekka Enberg
, (Mon Aug 9, 11:57 am)
Re: [PATCH 05/10] Reduce per table entry overhead by 4 bytes
, Pekka Enberg
, (Mon Aug 9, 11:59 am)
Re: [PATCH 08/10] Some cleanups
, Pekka Enberg
, (Mon Aug 9, 12:02 pm)
Re: [PATCH 10/10] Document sysfs entries
, Pekka Enberg
, (Mon Aug 9, 12:02 pm)
Re: [PATCH 06/10] Block discard support
, Pekka Enberg
, (Mon Aug 9, 12:03 pm)
Re: [PATCH 06/10] Block discard support
, Jens Axboe
, (Mon Aug 9, 7:23 pm)
Re: [PATCH 01/10] Replace ioctls with sysfs interface
, Nitin Gupta
, (Mon Aug 9, 8:06 pm)
Re: [PATCH 02/10] Remove need for explicit device initiali ...
, Nitin Gupta
, (Mon Aug 9, 8:38 pm)
Re: [PATCH 03/10] Use percpu stats
, Andrew Morton
, (Mon Aug 9, 9:34 pm)
Re: [PATCH 04/10] Use percpu buffers
, Nitin Gupta
, (Mon Aug 9, 9:47 pm)
Re: [PATCH 06/10] Block discard support
, Nitin Gupta
, (Mon Aug 9, 9:54 pm)
Re: [PATCH 05/10] Reduce per table entry overhead by 4 bytes
, Nitin Gupta
, (Mon Aug 9, 9:55 pm)
Re: [PATCH 04/10] Use percpu buffers
, Pekka Enberg
, (Mon Aug 9, 10:05 pm)
Re: [PATCH 04/10] Use percpu buffers
, Nitin Gupta
, (Mon Aug 9, 10:32 pm)
Re: [PATCH 04/10] Use percpu buffers
, Pekka Enberg
, (Tue Aug 10, 12:36 am)
Re: [PATCH 06/10] Block discard support
, Jens Axboe
, (Tue Aug 10, 8:54 am)
Re: [PATCH 03/10] Use percpu stats
, Nitin Gupta
, (Wed Aug 11, 9:39 am)
Re: [PATCH 03/10] Use percpu stats
, Andrew Morton
, (Wed Aug 11, 10:18 am)
Re: [PATCH 03/10] Use percpu stats
, Christoph Lameter
, (Mon Aug 30, 9:20 am)
Re: [PATCH 03/10] Use percpu stats
, Nitin Gupta
, (Tue Aug 31, 1:31 pm)
Re: [PATCH 03/10] Use percpu stats
, Eric Dumazet
, (Tue Aug 31, 2:28 pm)
Re: [PATCH 03/10] Use percpu stats
, Christoph Lameter
, (Tue Aug 31, 2:35 pm)
Re: [PATCH 03/10] Use percpu stats
, Eric Dumazet
, (Tue Aug 31, 2:41 pm)
Re: [PATCH 00/10] zram: various improvements and cleanups
, Greg KH
, (Tue Aug 31, 3:37 pm)
Re: [PATCH 01/10] Replace ioctls with sysfs interface
, Dave Hansen
, (Tue Aug 31, 4:06 pm)
Re: [PATCH 00/10] zram: various improvements and cleanups
, Anton Blanchard
, (Tue Aug 31, 8:32 pm)
Re: [PATCH 03/10] Use percpu stats
, Anton Blanchard
, (Tue Aug 31, 8:41 pm)
Re: [PATCH 03/10] Use percpu stats
, Anton Blanchard
, (Tue Aug 31, 8:51 pm)
Re: [PATCH 03/10] Use percpu stats
, Christoph Lameter
, (Wed Sep 1, 1:05 pm)
Re: [PATCH 03/10] Use percpu stats
, Eric Dumazet
, (Wed Sep 1, 1:38 pm)
Re: [PATCH 03/10] Use percpu stats
, Christoph Lameter
, (Wed Sep 1, 5:34 pm)
[patch -rc] oom: always return a badness score of non-zero ...
, David Rientjes
, (Thu Sep 9, 12:07 pm)
Re: [patch -rc] oom: always return a badness score of non- ...
, Dave Hansen
, (Thu Sep 9, 12:48 pm)
Re: [patch -rc] oom: always return a badness score of non- ...
, David Rientjes
, (Thu Sep 9, 2:00 pm)
Re: [patch -rc] oom: always return a badness score of non- ...
, Dave Hansen
, (Thu Sep 9, 2:10 pm)
Re: [patch -rc] oom: always return a badness score of non- ...
, David Rientjes
, (Thu Sep 9, 2:40 pm)
Re: [PATCH 03/10] Use percpu stats
, Andrew Morton
, (Fri Sep 17, 1:59 pm)
Re: OOM panics with zram
, Nitin Gupta
, (Sun Oct 3, 11:41 am)
Re: OOM panics with zram
, Dave Hansen
, (Sun Oct 3, 12:27 pm)
Re: OOM panics with zram
, Nitin Gupta
, (Sun Oct 3, 12:40 pm)
Re: OOM panics with zram
, Ed Tomlinson
, (Mon Oct 4, 4:08 am)
Re: OOM panics with zram
, Greg KH
, (Tue Oct 5, 4:43 pm)
Re: OOM panics with zram
, Nitin Gupta
, (Tue Oct 5, 7:29 pm)
Re: OOM panics with zram
, Greg KH
, (Tue Oct 5, 7:36 pm)
Re: OOM panics with zram
, Nitin Gupta
, (Tue Oct 5, 9:30 pm)
Re: OOM panics with zram
, Pekka Enberg
, (Wed Oct 6, 12:38 am)
Re: OOM panics with zram
, Greg KH
, (Wed Oct 6, 7:02 am)
Re: OOM panics with zram
, Greg KH
, (Wed Oct 6, 7:03 am)
Re: OOM panics with zram
, Pekka Enberg
, (Wed Oct 6, 7:16 am)
Re: OOM panics with zram
, Nitin Gupta
, (Wed Oct 6, 7:53 am)
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