From: Pankaj Gupta <pagupta@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: amit@kernel.org, mst@redhat.com, arnd@arndb.de,
virtualization@lists.linux-foundation.org, jasowang@redhat.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] virtio_console: free unused buffers with port delete
Date: Thu, 8 Aug 2019 08:19:24 -0400 (EDT) [thread overview]
Message-ID: <1593246032.7424344.1565266764494.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <20190808115555.GA2015@kroah.com>
>
> On Thu, Aug 08, 2019 at 05:06:05PM +0530, Pankaj Gupta wrote:
> > The commit a7a69ec0d8e4 ("virtio_console: free buffers after reset")
> > deferred detaching of unused buffer to virtio device unplug time.
> >
> > This causes unplug/replug of single port in virtio device with an
> > error "Error allocating inbufs\n". As we don't free the unused buffers
> > attached with the port. Re-plug the same port tries to allocate new
> > buffers in virtqueue and results in this error if queue is full.
> >
> > This patch removes the unused buffers in vq's when we unplug the port.
> > This is the best we can do as we cannot call device_reset because virtio
> > device is still active.
>
> Why is this indented?
o.k. will remove the empty lines.
>
> >
> > Reported-by: Xiaohui Li <xiaohli@redhat.com>
> > Fixes: b3258ff1d6 ("virtio_console: free buffers after reset")
>
> Fixes: b3258ff1d608 ("virtio: Decrement avail idx on buffer detach")
>
> is the correct format to use.
Sorry! for this. Commit it fixes is:
a7a69ec0d8e4 ("virtio_console: free buffers after reset")
>
> And given that this is from 2.6.39 (and 2.6.38.5), shouldn't it also be
> backported for the stable kernels?
Yes.
Thanks,
Pankaj
>
> thanks,
>
> greg k-h
>
next prev parent reply other threads:[~2019-08-08 12:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 11:36 [PATCH v2 0/2] virtio_console: fix replug of virtio console port Pankaj Gupta
2019-08-08 11:36 ` [PATCH v2 1/2] virtio_console: free unused buffers with port delete Pankaj Gupta
2019-08-08 11:55 ` Greg KH
2019-08-08 12:19 ` Pankaj Gupta [this message]
2019-08-08 11:36 ` [PATCH v2 2/2] virtio_ring: packed ring: fix virtqueue_detach_unused_buf Pankaj Gupta
2019-08-08 11:56 ` Greg KH
2019-08-08 12:28 ` Pankaj Gupta
2019-08-08 12:42 ` Greg KH
2019-08-08 12:44 ` Pankaj Gupta
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