On Fri, Feb 07, 2020 at 08:47:14AM +0100, Christian Borntraeger wrote:
> Also adding Cornelia.
>
>
> On 06.02.20 23:17, Michael S. Tsirkin wrote:
> > On Thu, Feb 06, 2020 at 04:12:21PM +0100, Christian Borntraeger wrote:
> >>
> >>
> >> On 06.02.20 15:22, eperezma@xxxxxxxxxx wrote:
> >>> Hi Christian.
> >>>
> >>> Could you try this patch on top of ("38ced0208491 vhost: use batched version by default")?
> >>>
> >>> It will not solve your first random crash but it should help with the lost of network connectivity.
> >>>
> >>> Please let me know how does it goes.
> >>
> >>
> >> 38ced0208491 + this seem to be ok.
> >>
> >> Not sure if you can make out anything of this (and the previous git bisect log)
> >
> > Yes it does - that this is just bad split-up of patches, and there's
> > still a real bug that caused worse crashes :)
> >
> > So I just pushed batch-v4.
> > I expect that will fail, and bisect to give us
> > vhost: batching fetches
> > Can you try that please?
> >
>
> yes.
>
> eccb852f1fe6bede630e2e4f1a121a81e34354ab is the first bad commit
> commit eccb852f1fe6bede630e2e4f1a121a81e34354ab
> Author: Michael S. Tsirkin <mst@xxxxxxxxxx>
> Date: Mon Oct 7 06:11:18 2019 -0400
>
> vhost: batching fetches
>
> With this patch applied, new and old code perform identically.
>
> Lots of extra optimizations are now possible, e.g.
> we can fetch multiple heads with copy_from/to_user now.
> We can get rid of maintaining the log array. Etc etc.
>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
>
> drivers/vhost/test.c | 2 +-
> drivers/vhost/vhost.c | 39 ++++++++++++++++++++++++++++++++++-----
> drivers/vhost/vhost.h | 4 +++-
> 3 files changed, 38 insertions(+), 7 deletions(-)
>
And the symptom is still the same - random crashes
after a bit of traffic, right?
> >
>
