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

[Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>]

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?

Ian.



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