[Pkg-xen-devel] [admin] [Xen-devel] [BUG] task jbd2/xvda4-8:174 blocked for more than 120 seconds.

[Samuel Thibault]

Hello,

Dongli Zhang, le lun. 18 févr. 2019 08:09:56 +0800, a ecrit:
> On 2/18/19 5:29 AM, Samuel Thibault wrote:
> >>>>> On 2/10/19 12:35 AM, Samuel Thibault wrote:
> >>>>>> Oh!  That could be it indeed.  I'm wondering what could be monopolizing
> >>>>>> them, though, and why +deb9u11 is affected while +deb9u10 is not.  I'm
> >>>>>> afraid increasing the gnttab max size to 32 might just defer filling it
> >>>>>> up.
> >>>>>>
> >>>>>>>   -# ./xen-diag  gnttab_query_size 5
> >>>>>>>   domid=5: nr_frames=11, max_nr_frames=32
> >>>>>>
...
> > The number seems to be going up by about one every day. So probably a
> > grant entry leak somewhere :/
> 
> This might not be a grant leak. The block pv driver would hold the persistent
> grant for a long time.

Just to give an update to close the thread: after a VM uptime of 111
days, nr_frames is at 41, so it looks like we don't have a leak, just a
busy VM :)

Samuel