From: Minchan Kim <minchan@kernel.org>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: zhouxianrong@huawei.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
sergey.senozhatsky@gmail.com, ngupta@vflare.org,
Mi.Sophia.Wang@huawei.com, zhouxiyu@huawei.com,
weidu.du@huawei.com, zhangshiming5@huawei.com,
won.ho.park@huawei.com
Subject: Re: [PATCH] mm: extend zero pages to same element pages for zram
Date: Fri, 13 Jan 2017 15:47:19 +0900 [thread overview]
Message-ID: <20170113064719.GA8018@bbox> (raw)
In-Reply-To: <20170113063614.GA484@jagdpanzerIV.localdomain>
On Fri, Jan 13, 2017 at 03:36:14PM +0900, Sergey Senozhatsky wrote:
> On (01/13/17 15:23), Minchan Kim wrote:
> [..]
> > > > Please add same_pages to tail of the stat
> > >
> > > sounds ok to me. and yes, can deprecate zero_pages.
> > >
> > > seems that with that patch the concept of ZRAM_ZERO disappears. both
> > > ZERO and SAME_ELEMENT pages are considered to be the same thing now.
> >
> > Right.
> >
> > > which is fine and makes sense to me, I think. and if ->.same_pages will
> > > replace ->.zero_pages in mm_stat() then I'm also OK. yes, we will see
> > > increased number in the last column of mm_stat file, but I don't tend
> > > to see any issues here. Minchan, what do you think?
> >
> > Could you elaborate a bit? Do you mean this?
> >
> > ret = scnprintf(buf, PAGE_SIZE,
> > "%8llu %8llu %8llu %8lu %8ld %8llu %8lu\n",
> > orig_size << PAGE_SHIFT,
> > (u64)atomic64_read(&zram->stats.compr_data_size),
> > mem_used << PAGE_SHIFT,
> > zram->limit_pages << PAGE_SHIFT,
> > max_used << PAGE_SHIFT,
> > // (u64)atomic64_read(&zram->stats.zero_pages),
> > (u64)atomic64_read(&zram->stats.same_pages),
> > pool_stats.pages_compacted);
>
> yes, correct.
>
> do we need to export it as two different stats (zero_pages and
> same_pages), if those are basically same thing internally?
So, let summary up.
1. replace zero_page stat into same page stat in mm_stat
2. s/zero_pages/same_pages/Documentation/blockdev/zram.txt
3. No need to warn to "cat /sys/block/zram0/mm_stat" user to see zero_pages
about semantic change
?
next prev parent reply other threads:[~2017-01-13 6:47 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-06 8:42 [PATCH] mm: extend zero pages to same element pages for zram zhouxianrong
2017-01-09 23:41 ` Minchan Kim
2017-01-13 4:24 ` Sergey Senozhatsky
2017-01-13 6:23 ` Minchan Kim
2017-01-13 6:36 ` Sergey Senozhatsky
2017-01-13 6:47 ` Minchan Kim [this message]
2017-01-13 7:02 ` Sergey Senozhatsky
2017-01-13 8:03 ` Minchan Kim
2017-01-13 8:29 ` zhouxianrong
2017-01-21 8:43 ` Sergey Senozhatsky
2017-01-22 2:58 ` zhouxianrong
2017-01-22 4:45 ` Sergey Senozhatsky
2017-01-23 2:58 ` Joonsoo Kim
2017-01-23 3:32 ` zhouxianrong
2017-01-23 4:03 ` Sergey Senozhatsky
2017-01-23 6:27 ` Joonsoo Kim
2017-01-23 7:13 ` Sergey Senozhatsky
2017-01-23 7:40 ` Minchan Kim
2017-01-24 7:58 ` zhouxianrong
2017-01-25 1:29 ` Minchan Kim
2017-01-25 1:32 ` Sergey Senozhatsky
2017-01-25 2:48 ` Matthew Wilcox
2017-01-25 4:18 ` Sergey Senozhatsky
2017-01-25 4:51 ` Minchan Kim
2017-01-25 5:38 ` Sergey Senozhatsky
2017-01-25 5:44 ` Minchan Kim
2017-01-23 6:26 ` Matthew Wilcox
2017-01-23 6:32 ` 答复: " zhouxianrong
2017-02-03 8:34 ` zhouxianrong
2017-02-03 8:42 ` zhouxianrong
2017-02-03 15:33 ` Matthew Wilcox
2017-02-04 3:33 ` zhouxianrong
2017-02-05 14:21 ` Minchan Kim
2017-02-06 1:28 ` zhouxianrong
2017-02-06 14:14 ` Matthew Wilcox
2017-02-06 23:48 ` Minchan Kim
2017-02-07 2:20 ` zhouxianrong
2017-02-07 2:54 ` Minchan Kim
2017-02-07 3:24 ` zhouxianrong
2017-02-07 4:57 ` Minchan Kim
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