linux-kernel - Re: [PATCHv8 0/6] add compressing abstraction and multi stream support

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Message-ID: <20140227080823.GA2210@swordfish.minsk.epam.com>
Date:	Thu, 27 Feb 2014 11:08:23 +0300
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jerome Marchand <jmarchan@...hat.com>,
	Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv8 0/6] add compressing abstraction and multi stream
 support

Hello Minchan,

On (02/27/14 11:16), Minchan Kim wrote:
> Hello Sergey,
> 
> Code looks good to me and I will queue it into ARM and x86 test tomorrow
> and give the result to you with Acked-by.
> 
> Thanks for your all works!
> 

thanks a lot!

	-ss

> On Wed, Feb 26, 2014 at 03:27:53PM +0300, Sergey Senozhatsky wrote:
> > This patchset introduces zcomp compression backend abstraction
> > adding ability to support compression algorithms other than LZO;
> > support for multi compression streams, making parallel compressions
> > possible.
> > 
> > v7->v8 (reviewed by Minchan Kim):
> > -- merge patches 'add multi stream functionality' and 'enable multi
> >    stream compression support in zram'
> > -- return status code from set_max_streams knob and print message on
> >    error
> > -- do not use atomic type for ->avail_strm
> > -- return back: allocate by default only one stream for multi stream backend
> > -- wake sleeping write in zcomp_strm_multi_put() only if we put stream
> >    to idle list
> > -- minor code `nitpicks'
> > 
> > v6->v7 (reviewed by Minchan Kim):
> > -- enable multi and single stream support out of the box (drop
> >    ZRAM_MULTI_STREAM config option)
> > -- add set_max_stream knob, so we can adjust max number of compression
> >    streams in runtime (for multi stream backend at the moment)
> > -- minor code `nitpicks'
> > 
> > v5->v6 (reviewed by Minchan Kim):
> > -- handle single compression stream case separately, using mutex locking,
> >    to address perfomance regression
> > -- handle multi compression stream using spin lock and wait_event()/wake_up()
> > -- make multi compression stream support configurable (ZRAM_MULTI_STREAM
> >    config option)
> > 
> > v4->v5 (reviewed by Minchan Kim):
> > -- renamed zcomp buffer_lock; removed src len and dst len from
> >    compress() and decompress(); not using term `buffer' and
> >    `workmem' in code and documentation; define compress() and
> >    decompress() functions for LZO backend; not using goto's;
> >    do not put idle zcomp_strm to idle list tail.
> > 
> > v3->v4 (reviewed by Minchan Kim):
> > -- renamed compression backend and working memory structs as requested
> >    by Minchan Kim; fixed several issues noted by Minchan Kim.
> > 
> > Sergey Senozhatsky (6):
> >   zram: introduce compressing backend abstraction
> >   zram: use zcomp compressing backends
> >   zram: factor out single stream compression
> >   zram: add multi stream functionality
> >   zram: add set_max_streams knob
> >   zram: document max_comp_streams
> > 
> >  Documentation/ABI/testing/sysfs-block-zram |   9 +-
> >  Documentation/blockdev/zram.txt            |  31 ++-
> >  drivers/block/zram/Makefile                |   2 +-
> >  drivers/block/zram/zcomp.c                 | 318 +++++++++++++++++++++++++++++
> >  drivers/block/zram/zcomp.h                 |  59 ++++++
> >  drivers/block/zram/zcomp_lzo.c             |  48 +++++
> >  drivers/block/zram/zram_drv.c              |  98 +++++----
> >  drivers/block/zram/zram_drv.h              |  10 +-
> >  8 files changed, 528 insertions(+), 47 deletions(-)
> >  create mode 100644 drivers/block/zram/zcomp.c
> >  create mode 100644 drivers/block/zram/zcomp.h
> >  create mode 100644 drivers/block/zram/zcomp_lzo.c
> > 
> > -- 
> > 1.9.0.291.g027825b
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> > Please read the FAQ at  http://www.tux.org/lkml/
> 
> -- 
> Kind regards,
> Minchan Kim
> 
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