Re: [Xen-devel] [PATCH 0/3] xen/blkback: several fixes of resource management

[Steven Haigh <netwiz@xxxxxxxxx>]

On 2017-05-16 16:23, Juergen Gross wrote:
> Destroying a Xen guest domain while it was doing I/Os via xen-blkback
> leaked several resources, including references of the guest's memory
> pages.
>
> This patch series addresses those leaks by correcting usage of
> reference counts and the sequence when to free which resource.
>
> The series applies on top of commit 2d4456c73a487abe ("block:
> xen-blkback: add null check to avoid null pointer dereference") in
> Jens Axboe's tree kernel/git/axboe/linux-block.git
>
> Juergen Gross (3):
>   xen/blkback: fix disconnect while I/Os in flight
>   xen/blkback: don't free be structure too early
>   xen/blkback: don't use xen_blkif_get() in xen-blkback kthread
>
>  drivers/block/xen-blkback/blkback.c |  3 ---
>  drivers/block/xen-blkback/common.h  |  1 +
>  drivers/block/xen-blkback/xenbus.c  | 15 ++++++++-------
>  3 files changed, 9 insertions(+), 10 deletions(-)
Tested-by: Steven Haigh <netwiz@xxxxxxxxx>

I've had a report that a new message is logged on destroy sometimes:
vif vif-1-0 vif1.0: Guest Rx stalled

This may be a different issue - however the main fix of this patch set 
is fully functional.
--
Steven Haigh

Email: netwiz@xxxxxxxxx
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897

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