From: Hui Zhu <teawater@gmail.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Hui Zhu <zhuhui@xiaomi.com>,
ngupta@vflare.org, sergey.senozhatsky.work@gmail.com,
Hugh Dickins <hughd@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
acme@kernel.org, alexander.shishkin@linux.intel.com,
Andrew Morton <akpm@linux-foundation.org>,
mhocko@suse.com, hannes@cmpxchg.org, mgorman@techsingularity.net,
vbabka@suse.cz, redkoi@virtuozzo.com, luto@kernel.org,
kirill.shutemov@linux.intel.com, geliangtang@163.com,
baiyaowei@cmss.chinamobile.com, dan.j.williams@intel.com,
vdavydov@virtuozzo.com, aarcange@redhat.com, dvlasenk@redhat.com,
jmarchan@redhat.com, koct9i@gmail.com, yang.shi@linaro.org,
dave.hansen@linux.intel.com, vkuznets@redhat.com,
vitalywool@gmail.com, ross.zwisler@linux.intel.com,
Thomas Gleixner <tglx@linutronix.de>,
kwapulinski.piotr@gmail.com, axboe@fb.com, mchristi@redhat.com,
Joe Perches <joe@perches.com>,
namit@vmware.com, Rik van Riel <riel@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [RFC 0/4] ZRAM: make it just store the high compression rate page
Date: Wed, 24 Aug 2016 09:29:49 +0800 [thread overview]
Message-ID: <CANFwon3NhwvsWVCVqpudKLyjREuHktzxdEXo5bn0THTjqZ+qLA@mail.gmail.com> (raw)
In-Reply-To: <20160824010415.GB27022@bbox>
Hi Minchan,
On Wed, Aug 24, 2016 at 9:04 AM, Minchan Kim <minchan@kernel.org> wrote:
> Hi Hui,
>
> On Mon, Aug 22, 2016 at 04:25:05PM +0800, Hui Zhu wrote:
>> Current ZRAM just can store all pages even if the compression rate
>> of a page is really low. So the compression rate of ZRAM is out of
>> control when it is running.
>> In my part, I did some test and record with ZRAM. The compression rate
>> is about 40%.
>>
>> This series of patches make ZRAM can just store the page that the
>> compressed size is smaller than a value.
>> With these patches, I set the value to 2048 and did the same test with
>> before. The compression rate is about 20%. The times of lowmemorykiller
>> also decreased.
>
> I have an interest about the feature for a long time but didn't work on it
> because I didn't have a good idea to implment it with generic approach
> without layer violation. I will look into this after handling urgent works.
>
> Thanks.
That will be great. Thanks.
Best,
Hui
WARNING: multiple messages have this Message-ID (diff)
From: Hui Zhu <teawater@gmail.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Hui Zhu <zhuhui@xiaomi.com>,
ngupta@vflare.org, sergey.senozhatsky.work@gmail.com,
Hugh Dickins <hughd@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
acme@kernel.org, alexander.shishkin@linux.intel.com,
Andrew Morton <akpm@linux-foundation.org>,
mhocko@suse.com, hannes@cmpxchg.org, mgorman@techsingularity.net,
vbabka@suse.cz, redkoi@virtuozzo.com, luto@kernel.org,
kirill.shutemov@linux.intel.com, geliangtang@163.com,
baiyaowei@cmss.chinamobile.com, dan.j.williams@intel.com,
vdavydov@virtuozzo.com, aarcange@redhat.com, dvlasenk@redhat.com,
jmarchan@redhat.com, koct9i@gmail.com, yang.shi@linaro.org,
dave.hansen@linux.intel.com, vkuznets@redhat.com,
vitalywool@gmail.com, ross.zwisler@linux.intel.com,
Thomas Gleixner <tglx@linutronix.de>,
kwapulinski.piotr@gmail.com, axboe@fb.com, mchristi@redhat.com,
Joe Perches <joe@perches.com>,
namit@vmware.com, Rik van Riel <riel@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [RFC 0/4] ZRAM: make it just store the high compression rate page
Date: Wed, 24 Aug 2016 09:29:49 +0800 [thread overview]
Message-ID: <CANFwon3NhwvsWVCVqpudKLyjREuHktzxdEXo5bn0THTjqZ+qLA@mail.gmail.com> (raw)
In-Reply-To: <20160824010415.GB27022@bbox>
Hi Minchan,
On Wed, Aug 24, 2016 at 9:04 AM, Minchan Kim <minchan@kernel.org> wrote:
> Hi Hui,
>
> On Mon, Aug 22, 2016 at 04:25:05PM +0800, Hui Zhu wrote:
>> Current ZRAM just can store all pages even if the compression rate
>> of a page is really low. So the compression rate of ZRAM is out of
>> control when it is running.
>> In my part, I did some test and record with ZRAM. The compression rate
>> is about 40%.
>>
>> This series of patches make ZRAM can just store the page that the
>> compressed size is smaller than a value.
>> With these patches, I set the value to 2048 and did the same test with
>> before. The compression rate is about 20%. The times of lowmemorykiller
>> also decreased.
>
> I have an interest about the feature for a long time but didn't work on it
> because I didn't have a good idea to implment it with generic approach
> without layer violation. I will look into this after handling urgent works.
>
> Thanks.
That will be great. Thanks.
Best,
Hui
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next prev parent reply other threads:[~2016-08-24 1:55 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 8:25 [RFC 0/4] ZRAM: make it just store the high compression rate page Hui Zhu
2016-08-22 8:25 ` Hui Zhu
2016-08-22 8:25 ` [RFC 1/4] vmscan.c: shrink_page_list: unmap anon pages after pageout Hui Zhu
2016-08-22 8:25 ` Hui Zhu
2016-08-22 8:25 ` [RFC 2/4] Add non-swap page flag to mark a page will not swap Hui Zhu
2016-08-22 8:25 ` Hui Zhu
2016-09-06 15:35 ` Steven Rostedt
2016-09-06 15:35 ` Steven Rostedt
2016-08-22 8:25 ` [RFC 3/4] ZRAM: do not swap the page that compressed size bigger than non_swap Hui Zhu
2016-08-22 8:25 ` Hui Zhu
2016-08-22 8:25 ` [RFC 4/4] vmscan.c: zram: add non swap support for shmem file pages Hui Zhu
2016-08-22 8:25 ` Hui Zhu
2016-08-24 1:04 ` [RFC 0/4] ZRAM: make it just store the high compression rate page Minchan Kim
2016-08-24 1:04 ` Minchan Kim
2016-08-24 1:29 ` Hui Zhu [this message]
2016-08-24 1:29 ` Hui Zhu
2016-08-25 6:09 ` Sergey Senozhatsky
2016-08-25 6:09 ` Sergey Senozhatsky
2016-08-25 8:25 ` Hui Zhu
2016-08-25 8:25 ` Hui Zhu
2016-09-05 2:18 ` Minchan Kim
2016-09-05 2:18 ` Minchan Kim
2016-09-05 3:59 ` Sergey Senozhatsky
2016-09-05 3:59 ` Sergey Senozhatsky
2016-09-05 5:12 ` Hui Zhu
2016-09-05 5:12 ` Hui Zhu
2016-09-05 5:51 ` Minchan Kim
2016-09-05 5:51 ` Minchan Kim
2016-09-05 6:02 ` Hui Zhu
2016-09-05 6:02 ` Hui Zhu
2016-09-05 2:12 ` Minchan Kim
2016-09-05 2:12 ` Minchan Kim
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