Re: [Xen-users] LVM2 snapshots and XEN = problem :(

[Matt Ayres <matta@xxxxxxxxxxxx>]

Anton Khalikov wrote:
> Hello Matt
>
> Matt Ayres wrote:
> > What is your dom0/domU kernel version?
> dom0:
> uname -a
> Linux andrew 2.6.16-xen0 #2 Sat May 6 15:23:55 YEKST 2006 i686 GNU/Linux
>
> domU:
> uname -a
> Linux xen1 2.6.16-xenU #2 SMP Sat May 6 15:28:43 YEKST 2006 i686 GNU/Linux
>
> xen version 3.0.2
It is a 2.6.16 issue.  It was fixed in 2.6.16.12. Latest Xen is 
2.6.16.13 from 3.0-testing.
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.12



commit f6a731290ca18b31fd447989319eb913d9c308d8
Author: Alasdair G Kergon <agk@xxxxxxxxxx>
Date:   Mon Apr 24 13:36:06 2006 -0700

    [PATCH] dm snapshot: fix kcopyd destructor

    Before removing a snapshot, wait for the completion of any kcopyd 
jobs using it. Do this by maintaining a count (nr_jobs) of how many 
outstanding jobs each kcopyd_client has.
    The snapshot destructor first unregisters the snapshot so that no 
new kcopyd jobs (created by writes to the origin) will reference that 
particular snapshot.  kcopyd_client_destroy() is now run next to wait 
for the completion of any outstanding jobs before the snapshot exception 
structures (that those jobs reference) are freed.
    Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
    Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
    Signed-off-by: Linus Torvalds <torvalds@xxxxxxxx>
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

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