linux-ext4 - Re: [RFC v3 00/13] vfs: hot data tracking

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Date:	Thu, 18 Oct 2012 12:44:47 +0800
From:	Zhi Yong Wu <zwu.kernel@...il.com>
To:	Dave Chinner <david@...morbit.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxram@...ux.vnet.ibm.com, viro@...iv.linux.org.uk,
	dave@...os.cz, tytso@....edu, cmm@...ibm.com,
	Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
Subject: Re: [RFC v3 00/13] vfs: hot data tracking

On Thu, Oct 18, 2012 at 12:29 PM, Dave Chinner <david@...morbit.com> wrote:
> On Wed, Oct 17, 2012 at 04:57:14PM +0800, Zhi Yong Wu wrote:
>> On Tue, Oct 16, 2012 at 4:42 AM, Dave Chinner <david@...morbit.com> wrote:
>> > On Wed, Oct 10, 2012 at 06:07:22PM +0800, zwu.kernel@...il.com wrote:
>> >> From: Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
> ....
>> > (*) Tested on an empty 17TB XFS filesystem with:
>> >
>> > $ sudo mkfs.xfs -f -l size=131072b,sunit=8 /dev/vdc
>> > meta-data=/dev/vdc               isize=256    agcount=17, agsize=268435455 blks
>> >          =                       sectsz=512   attr=2, projid32bit=0
>> > data     =                       bsize=4096   blocks=4563402735, imaxpct=5
>> >          =                       sunit=0      swidth=0 blks
>> > naming   =version 2              bsize=4096   ascii-ci=0
>> > log      =internal log           bsize=4096   blocks=131072, version=2
>> >          =                       sectsz=512   sunit=1 blks, lazy-count=1
>> > realtime =none                   extsz=4096   blocks=0, rtextents=0
>> > $ sudo mount -o logbsize=256k /dev/vdc /mnt/scratch
>> > $ sudo chmod 777 /mnt/scratch
>> > $ fs_mark  -D  10000  -S0  -n  100000  -s  1  -L  63  -d \
>> > /mnt/scratch/0  -d  /mnt/scratch/1  -d  /mnt/scratch/2  -d \
>> > /mnt/scratch/3  -d  /mnt/scratch/4  -d  /mnt/scratch/5  -d \
>> > /mnt/scratch/6  -d  /mnt/scratch/7
>> > .....
>> >      0     21600000            1      16679.3         12552262
>> >      0     22400000            1      15412.4         12588587
>> >      0     23200000            1      16367.6         14199322
>> >      0     24000000            1      15680.4         15741205
>> > <hangs here w/ OOM>
>> ^^^^In this test, i haven't see you enable hot_track function via
>> mount, why did it meet OOM?
>
> I copied the wrong mount command. It was definitely enabled.
OK, BTW: fs_mark is the script written by you? After xfsprogs is
installed, i haven't found this command.

>
> Cheers,
>
> Dave.
>
> --
> Dave Chinner
> david@...morbit.com



-- 
Regards,

Zhi Yong Wu
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