RE: [Xen-devel] Why xs_domain_open() in fs_backend

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

>-----Original Message-----
>From: Ian Campbell [mailto:Ian.Campbell@xxxxxxxxxxxxx]
>Sent: Wednesday, October 13, 2010 11:35 PM
>To: Jiang, Yunhong
>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; gm281@xxxxxxxxx
>Subject: RE: [Xen-devel] Why xs_domain_open() in fs_backend
>
>On Wed, 2010-10-13 at 15:04 +0100, Jiang, Yunhong wrote:
>> [root@vt_wb_jimmy xen-unstable]# xenstore-watch /local/domain/0/a/b |
>> while read w ; do echo "watch fired on $w"; echo "value"
>> $(xenstore-read $w); echo; done  xenstore-watch: Unable to add watch
>> on /local/domain/0/a/b
>>
>>
>>
>> One thing need notice is, the first time when I use xenstore-watch
>> without -s, it will not fail with "Unable to add watch on ....",
>> instead, it will simply not print anything when I change the
>> a/b/c/defe value, then I ctrl-c to kill it. Next time it will fail
>> with "Unable to add watch on ...", as log below. Hope this will be
>> helpful.
>
>Very strange indeed.
>
>>  BTW, what's your dom0 version?
>
>Pretty recent xen.git, I don't have a specific changeset but I think it
>is around 56b5a161fd2f8b13a47497bac7c9e5d1e446ffc6.
>
>Which dom0 kernel and what version are you using?

I' using xen/master branch in pvops :

[root@vt_wb_jimmy linux-2.6-pvops.git]# git branch
  origin/xen/stable-2.6.32.x
* xen/master
  xen/master.stgit
[root@vt_wb_jimmy linux-2.6-pvops.git]# git log -v |head -n 20
commit 641c127b67b3b1a4f6a79b6189ed2189cec46012
Merge: 5f8784c... a389e98...
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Date:   Tue Jul 6 16:04:30 2010 -0700

    Merge commit 'v2.6.31.14' into xen/stable-2.6.31.x

    * commit 'v2.6.31.14':
      Linux 2.6.31.14
      posix_timer: Fix error path in timer_create
      reiserfs: fix corruption during shrinking of xattrs
      reiserfs: fix permissions on .reiserfs_priv
      ALSA: mixart: range checking proc file

commit a389e98d2c6e1900f035befe215f541436bcb0b2
Author: Greg Kroah-Hartman <gregkh@xxxxxxx>
Date:   Mon Jul 5 10:11:43 2010 -0700

    Linux 2.6.31.14

Thanks
--jyh

>
>Ian.
>

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