From: "Huang\, Ying" <ying.huang@intel.com>
To: Rik van Riel <riel@redhat.com>
Cc: "Huang, Ying" <ying.huang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Johannes Weiner <hannes@cmpxchg.org>,
Minchan Kim <minchan@kernel.org>, Shaohua Li <shli@kernel.org>,
Hugh Dickins <hughd@google.com>,
Fengguang Wu <fengguang.wu@intel.com>,
Tim Chen <tim.c.chen@intel.com>,
Dave Hansen <dave.hansen@intel.com>
Subject: Re: [PATCH -mm -v3 1/6] mm, swap: Add swap cache statistics sysfs interface
Date: Wed, 26 Jul 2017 09:30:26 +0800 [thread overview]
Message-ID: <87h8y0gf2l.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <1501016754.26846.22.camel@redhat.com> (Rik van Riel's message of "Tue, 25 Jul 2017 17:05:54 -0400")
Hi, Rik,
Rik van Riel <riel@redhat.com> writes:
> On Tue, 2017-07-25 at 09:51 +0800, Huang, Ying wrote:
>> From: Huang Ying <ying.huang@intel.com>
>>
>> The swap cache stats could be gotten only via sysrq, which isn't
>> convenient in some situation.A A So the sysfs interface of swap cache
>> stats is added for that.A A The added sysfs directories/files are as
>> follow,
>>
>> /sys/kernel/mm/swap
>> /sys/kernel/mm/swap/cache_find_total
>> /sys/kernel/mm/swap/cache_find_success
>> /sys/kernel/mm/swap/cache_add
>> /sys/kernel/mm/swap/cache_del
>> /sys/kernel/mm/swap/cache_pages
>>
> What is the advantage of this vs new fields in
> /proc/vmstat, which is where most of the VM
> statistics seem to live?
As proposed by Andrew, will use debugfs for them, because they are
mostly developer related.
Best Regards,
Huang, Ying
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WARNING: multiple messages have this Message-ID (diff)
From: "Huang\, Ying" <ying.huang@intel.com>
To: Rik van Riel <riel@redhat.com>
Cc: "Huang\, Ying" <ying.huang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Minchan Kim <minchan@kernel.org>, Shaohua Li <shli@kernel.org>,
Hugh Dickins <hughd@google.com>,
Fengguang Wu <fengguang.wu@intel.com>,
Tim Chen <tim.c.chen@intel.com>,
Dave Hansen <dave.hansen@intel.com>
Subject: Re: [PATCH -mm -v3 1/6] mm, swap: Add swap cache statistics sysfs interface
Date: Wed, 26 Jul 2017 09:30:26 +0800 [thread overview]
Message-ID: <87h8y0gf2l.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <1501016754.26846.22.camel@redhat.com> (Rik van Riel's message of "Tue, 25 Jul 2017 17:05:54 -0400")
Hi, Rik,
Rik van Riel <riel@redhat.com> writes:
> On Tue, 2017-07-25 at 09:51 +0800, Huang, Ying wrote:
>> From: Huang Ying <ying.huang@intel.com>
>>
>> The swap cache stats could be gotten only via sysrq, which isn't
>> convenient in some situation. So the sysfs interface of swap cache
>> stats is added for that. The added sysfs directories/files are as
>> follow,
>>
>> /sys/kernel/mm/swap
>> /sys/kernel/mm/swap/cache_find_total
>> /sys/kernel/mm/swap/cache_find_success
>> /sys/kernel/mm/swap/cache_add
>> /sys/kernel/mm/swap/cache_del
>> /sys/kernel/mm/swap/cache_pages
>>
> What is the advantage of this vs new fields in
> /proc/vmstat, which is where most of the VM
> statistics seem to live?
As proposed by Andrew, will use debugfs for them, because they are
mostly developer related.
Best Regards,
Huang, Ying
next prev parent reply other threads:[~2017-07-26 1:30 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-25 1:51 [PATCH -mm -v3 0/6] mm, swap: VMA based swap readahead Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 1:51 ` [PATCH -mm -v3 1/6] mm, swap: Add swap cache statistics sysfs interface Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 20:42 ` Andrew Morton
2017-07-25 20:42 ` Andrew Morton
2017-07-26 1:29 ` Huang, Ying
2017-07-26 1:29 ` Huang, Ying
2017-07-25 21:05 ` Rik van Riel
2017-07-26 1:30 ` Huang, Ying [this message]
2017-07-26 1:30 ` Huang, Ying
2017-07-25 1:51 ` [PATCH -mm -v3 2/6] mm, swap: Add swap readahead hit statistics Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 1:51 ` [PATCH -mm -v3 3/6] mm, swap: Fix swap readahead marking Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 1:51 ` [PATCH -mm -v3 4/6] mm, swap: VMA based swap readahead Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 1:51 ` [PATCH -mm -v3 5/6] mm, swap: Add sysfs interface for " Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 1:51 ` [PATCH -mm -v3 6/6] mm, swap: Don't use VMA based swap readahead if HDD is used as swap Huang, Ying
2017-07-25 1:51 ` Huang, Ying
2017-07-25 20:50 ` Andrew Morton
2017-07-25 20:50 ` Andrew Morton
2017-07-26 1:17 ` Huang, Ying
2017-07-26 1:17 ` Huang, Ying
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