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Re: [PATCH 00/10] zram: various improvements and cleanups

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From: Anton Blanchard
Subject: Re: [PATCH 00/10] zram: various improvements and cleanups
Date: Tuesday, August 31, 2010 - 8:32 pm

Hi Nitin,

I gave zram a try on a ppc64 box with a 64kB PAGE_SIZE. It looks like the
xvmalloc allocator fails when we add in a large enough block (in this case
65532 bytes).

flindex ends up as 127 which is larger than BITS_PER_LONG. We continually call
grow_block inside find_block and fail:

zram: Error allocating memory for compressed page: 0, size=467

Anton
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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)