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From: Minchan Kim <minchan@kernel.org>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Joey Pabalinas <joeypabalinas@gmail.com>
Subject: Re: [PATCH v3 7/7] zram: writeback throttle
Date: Mon, 3 Dec 2018 08:18:29 +0900
Message-ID: <20181202231829.GA21560@google.com> (raw)
In-Reply-To: <20181129022358.GA6379@jagdpanzerIV>

On Thu, Nov 29, 2018 at 11:23:58AM +0900, Sergey Senozhatsky wrote:
> On (11/27/18 14:54), Minchan Kim wrote:
> > diff --git a/Documentation/ABI/testing/sysfs-block-zram b/Documentation/ABI/testing/sysfs-block-zram
> > index 65fc33b2f53b..9d2339a485c8 100644
> > --- a/Documentation/ABI/testing/sysfs-block-zram
> > +++ b/Documentation/ABI/testing/sysfs-block-zram
> > @@ -121,3 +121,12 @@ Contact:	Minchan Kim <minchan@kernel.org>
> >  		The bd_stat file is read-only and represents backing device's
> >  		statistics (bd_count, bd_reads, bd_writes) in a format
> >  		similar to block layer statistics file format.
> > +
> > +What:		/sys/block/zram<id>/writeback_limit
> > +Date:		November 2018
> > +Contact:	Minchan Kim <minchan@kernel.org>
> > +Description:
> > +		The writeback_limit file is read-write and specifies the maximum
> > +		amount of writeback ZRAM can do. The limit could be changed
> > +		in run time and "0" means disable the limit.
> > +		No limit is the initial state.
> > diff --git a/Documentation/blockdev/zram.txt b/Documentation/blockdev/zram.txt
> > index 906df97527a7..64b61925e475 100644
> > --- a/Documentation/blockdev/zram.txt
> > +++ b/Documentation/blockdev/zram.txt
> > @@ -164,6 +164,8 @@ reset             WO    trigger device reset
> >  mem_used_max      WO    reset the `mem_used_max' counter (see later)
> >  mem_limit         WO    specifies the maximum amount of memory ZRAM can use
> >                          to store the compressed data
> > +writeback_limit   WO    specifies the maximum amount of write IO zram can
> > +			write out to backing device as 4KB unit
> 						       ^^^^
> 						page size units?

Per andrew's comment:
https://lkml.org/lkml/2018/11/27/156

I need to fix it to represent 4K always.

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-27  5:54 [PATCH v3 0/7] zram idle page writeback Minchan Kim
2018-11-27  5:54 ` [PATCH v3 1/7] zram: fix lockdep warning of free block handling Minchan Kim
2018-11-29  2:43   ` Sergey Senozhatsky
2018-11-27  5:54 ` [PATCH v3 2/7] zram: fix double free backing device Minchan Kim
2018-11-29  2:32   ` Sergey Senozhatsky
2018-11-27  5:54 ` [PATCH v3 3/7] zram: refactoring flags and writeback stuff Minchan Kim
2018-11-27  5:54 ` [PATCH v3 4/7] zram: introduce ZRAM_IDLE flag Minchan Kim
2018-11-29  2:29   ` Sergey Senozhatsky
2018-11-27  5:54 ` [PATCH v3 5/7] zram: support idle/huge page writeback Minchan Kim
2018-11-28 23:35   ` Andrew Morton
2018-11-29  1:36     ` Minchan Kim
2018-11-27  5:54 ` [PATCH v3 6/7] zram: add bd_stat statistics Minchan Kim
2018-11-27  5:54 ` [PATCH v3 7/7] zram: writeback throttle Minchan Kim
2018-11-28 23:41   ` Andrew Morton
2018-11-29  1:55     ` Minchan Kim
2018-11-29  2:23   ` Sergey Senozhatsky
2018-12-02 23:18     ` Minchan Kim [this message]
2018-12-03  2:30       ` Sergey Senozhatsky
2018-12-03  2:41         ` Minchan Kim
2018-12-03  2:45           ` Sergey Senozhatsky
2018-11-30  4:36 ` [PATCH v3 0/7] zram idle page writeback Sergey Senozhatsky
2018-12-02 23:20   ` Minchan Kim
2018-12-02 23:28 ` Joey Pabalinas

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