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SubjectRe: [PATCHv5 0/4] mm/zpool: add common api for zswap to use zbud/zsmalloc
Hey Seth,

have a chance to test yet?

On Wed, Jul 16, 2014 at 6:00 PM, Seth Jennings <sjennings@variantweb.net> wrote:
> On Wed, Jul 16, 2014 at 05:05:45PM -0400, Dan Streetman wrote:
>> On Wed, Jul 16, 2014 at 4:59 PM, Seth Jennings <sjennings@variantweb.net> wrote:
>> > On Mon, Jul 14, 2014 at 02:10:42PM -0400, Dan Streetman wrote:
>> >> Andrew, any thoughts on this latest version of the patch set? Let me
>> >> know if I missed anything or you have any other suggestions.
>> >>
>> >> Seth, did you get a chance to review this and/or test it out?
>> >
>> > I did have a chance to test it out quickly and didn't run into any
>> > issues. Your patchset is already in linux-next so I'll test more from
>> > there.
>>
>> This latest version has a few changes that Andrew requested, which
>> presumably will replace the patches that are currently in -mm and
>> -next; can you test with these patches instead of (or in addition to)
>> what's in -next?
>
> Looks like Andrew just did the legwork for me to get the new patches
> into mmotm. When the hit there (tomorrow?), I'll put it down and test
> with that.
>
> Thanks,
> Seth
>
>>
>> >
>> > Seth
>> >
>> >>
>> >>
>> >>
>> >> On Wed, Jul 2, 2014 at 5:45 PM, Dan Streetman <ddstreet@ieee.org> wrote:
>> >> > In order to allow zswap users to choose between zbud and zsmalloc for
>> >> > the compressed storage pool, this patch set adds a new api "zpool" that
>> >> > provides an interface to both zbud and zsmalloc. This does not include
>> >> > implementing shrinking in zsmalloc, which will be sent separately.
>> >> >
>> >> > I believe Seth originally was using zsmalloc for swap, but there were
>> >> > concerns about how significant the impact of shrinking zsmalloc would
>> >> > be when zswap had to start reclaiming pages. That still may be an
>> >> > issue, but this at least allows users to choose themselves whether
>> >> > they want a lower-density or higher-density compressed storage medium.
>> >> > At least for situations where zswap reclaim is never or rarely reached,
>> >> > it probably makes sense to use the higher density of zsmalloc.
>> >> >
>> >> > Note this patch set does not change zram to use zpool, although that
>> >> > change should be possible as well.
>> >> >
>> >> > ---
>> >> > Changes since v4 : https://lkml.org/lkml/2014/6/2/711
>> >> > -omit first patch, that removed gfp_t param from zpool_malloc()
>> >> > -move function doc from zpool.h to zpool.c
>> >> > -move module usage refcounting into patch that adds zpool
>> >> > -add extra refcounting to prevent driver unregister if in use
>> >> > -add doc clarifying concurrency usage
>> >> > -make zbud/zsmalloc zpool functions static
>> >> > -typo corrections
>> >> >
>> >> > Changes since v3 : https://lkml.org/lkml/2014/5/24/130
>> >> > -In zpool_shrink() use # pages instead of # bytes
>> >> > -Add reclaimed param to zpool_shrink() to indicate to caller
>> >> > # pages actually reclaimed
>> >> > -move module usage counting to zpool, from zbud/zsmalloc
>> >> > -update zbud_zpool_shrink() to call zbud_reclaim_page() in a
>> >> > loop until requested # pages have been reclaimed (or error)
>> >> >
>> >> > Changes since v2 : https://lkml.org/lkml/2014/5/7/927
>> >> > -Change zpool to use driver registration instead of hardcoding
>> >> > implementations
>> >> > -Add module use counting in zbud/zsmalloc
>> >> >
>> >> > Changes since v1 https://lkml.org/lkml/2014/4/19/97
>> >> > -remove zsmalloc shrinking
>> >> > -change zbud size param type from unsigned int to size_t
>> >> > -remove zpool fallback creation
>> >> > -zswap manually falls back to zbud if specified type fails
>> >> >
>> >> >
>> >> > Dan Streetman (4):
>> >> > mm/zbud: change zbud_alloc size type to size_t
>> >> > mm/zpool: implement common zpool api to zbud/zsmalloc
>> >> > mm/zpool: zbud/zsmalloc implement zpool
>> >> > mm/zpool: update zswap to use zpool
>> >> >
>> >> > include/linux/zbud.h | 2 +-
>> >> > include/linux/zpool.h | 106 +++++++++++++++
>> >> > mm/Kconfig | 43 +++---
>> >> > mm/Makefile | 1 +
>> >> > mm/zbud.c | 98 +++++++++++++-
>> >> > mm/zpool.c | 364 ++++++++++++++++++++++++++++++++++++++++++++++++++
>> >> > mm/zsmalloc.c | 84 ++++++++++++
>> >> > mm/zswap.c | 75 ++++++-----
>> >> > 8 files changed, 722 insertions(+), 51 deletions(-)
>> >> > create mode 100644 include/linux/zpool.h
>> >> > create mode 100644 mm/zpool.c
>> >> >
>> >> > --
>> >> > 1.8.3.1
>> >> >


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