[linux-lvm] why 'lvcreate' command blocked?

[Busby.Cheung]

 I haven't figured it out. I should check more information and learn more.
 
 
 > -----原始邮件-----
> 发件人: "Ray Morris" <support at bettercgi.com>
> 发送时间: 2011年7月2日 星期六
> 收件人: "LVM general discussion and development" <linux-lvm at redhat.com>
> 抄送: chaimvy at 163.com
> 主题: Re: [linux-lvm] why 'lvcreate' command blocked?
> 
> Please let me know if you figure it out. I have a server
> with a similar problem which persists even after changing 
> virtually every component of the system. One hint I learned
> is that it can at times hang for serveral hours and then 
> proceed. Just because it's been several minutes does not 
> necesarily mean a 180 mile trip to the datacenter.
> -- 
> Ray Morris
> support at bettercgi.com
> 
> Strongbox - The next generation in site security:
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> 
> 
> 
> On Fri, 1 Jul 2011 14:49:09 +0800 (CST)
> "Busby.Cheung" <chaimvy at 163.com> wrote:
> 
> > Hi ALL，
> >        When I used the lvcreate cmd in my system, it blocked for a
> > long time. My OS kernel version is linux-2.6.29, is there any bug?
> > Here is the mesg: INFO: task lvcreate:30225 blocked for more than 480
> > seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
> > this message. lvcreate      D ffff880028088780     0 30225  25700
> >  ffff88013e02a100 0000000000000086 0000000000000000 0000000000000000
> >  00000000000000d0 ffff880124879910 ffff880124879c70 00000001000aaa4a
> >  ffffffffffffffff ffffffffffffffff ffffffffffffffff 7fffffffffffffff
> > Call Trace:
> >  [<ffffffff804d4d5d>] io_schedule+0x5d/0x9e
> >  [<ffffffff802bfff5>] __blockdev_direct_IO+0x8a4/0xa3b
> >  [<ffffffff80272842>] __filemap_fdatawrite_range+0x54/0x5e
> >  [<ffffffff802bee5e>] blkdev_direct_IO+0x45/0x4a
> >  [<ffffffff802bed84>] blkdev_get_blocks+0x0/0x95
> >  [<ffffffff80272c28>] generic_file_direct_write+0xd2/0x18b
> >  [<ffffffff80272f65>] __generic_file_aio_write_nolock+0x284/0x3a5
> >  [<ffffffff802734d7>] generic_file_aio_read+0xe1/0x539
> >  [<ffffffff80273138>] generic_file_aio_write_nolock+0x34/0x80
> >  [<ffffffff8029d6db>] do_sync_write+0xc9/0x10c
> >  [<ffffffff803958e4>] tty_put_char+0x2b/0x2d
> >  [<ffffffff80249396>] autoremove_wake_function+0x0/0x2e
> >  [<ffffffff80326a0c>] selinux_file_permission+0x5a/0x120
> >  [<ffffffff8029ddd7>] vfs_write+0xad/0x136
> >  [<ffffffff8029e2f4>] sys_write+0x45/0x6e
> >  [<ffffffff8020bedb>] system_call_fastpath+0x16/0x1b
> > 
> >    I don't know whether it is the kernel's scheduling bug or the
> > lvm2's bug, anyone knows? 
> > Best Wishes!
> > 
> > 
> >  
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