From: Halil Pasic <pasic@linux.ibm.com>
To: Jason Wang <jasowang@redhat.com>
Cc: Cindy Lu <lulu@redhat.com>,
"Paul E. McKenney" <paulmck@kernel.org>, mst <mst@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Marc Zyngier <maz@kernel.org>, Cornelia Huck <cohuck@redhat.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
virtualization <virtualization@lists.linux-foundation.org>,
Halil Pasic <pasic@linux.ibm.com>, eperezma <eperezma@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH V4 0/9] rework on the IRQ hardening of virtio
Date: Wed, 11 May 2022 16:01:47 +0200 [thread overview]
Message-ID: <20220511160147.46cbf2fb.pasic@linux.ibm.com> (raw)
In-Reply-To: <CACGkMEvfkUpsY4LRTuH7w18DZdq+w3=Ef6b-0sG0XvzVUVKdzg@mail.gmail.com>
On Wed, 11 May 2022 10:22:59 +0800
Jason Wang <jasowang@redhat.com> wrote:
> > CPU0
> > ----
> > lock(&vcdev->irq_lock);
> > <Interrupt>
> > lock(&vcdev->irq_lock);
> >
> > *** DEADLOCK ***
>
> It looks to me we need to use write_lock_irq()/write_unlock_irq() to
> do the synchronization.
>
> And we probably need to keep the
> read_lock_irqsave()/read_lock_irqrestore() logic since I can see the
> virtio_ccw_int_handler() to be called from process context (e.g from
> the io_subchannel_quiesce()).
>
Sounds correct.
Regards,
Halil
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next prev parent reply other threads:[~2022-05-11 14:02 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-07 7:19 [PATCH V4 0/9] rework on the IRQ hardening of virtio Jason Wang
2022-05-07 7:19 ` [PATCH V4 1/9] virtio: use virtio_device_ready() in virtio_device_restore() Jason Wang
2022-05-09 15:22 ` Cornelia Huck
2022-05-10 1:50 ` Jason Wang
2022-05-07 7:19 ` [PATCH V4 2/9] virtio: use virtio_reset_device() when possible Jason Wang
2022-05-07 7:19 ` [PATCH V4 3/9] virtio: introduce config op to synchronize vring callbacks Jason Wang
2022-05-09 15:24 ` Cornelia Huck
2022-05-07 7:19 ` [PATCH V4 4/9] virtio-pci: implement synchronize_cbs() Jason Wang
2022-05-09 15:26 ` Cornelia Huck
2022-05-07 7:19 ` [PATCH V4 5/9] virtio-mmio: " Jason Wang
2022-05-09 15:34 ` Cornelia Huck
2022-05-07 7:19 ` [PATCH V4 6/9] virtio-ccw: " Jason Wang
2022-05-10 11:27 ` Michael S. Tsirkin
2022-05-11 2:41 ` Jason Wang
2022-05-11 8:17 ` Cornelia Huck
2022-05-11 8:58 ` Jason Wang
2022-05-11 9:13 ` Cornelia Huck
2022-05-11 9:28 ` Jason Wang
[not found] ` <YnvNmtPgip5knLHP@tuxmaker.boeblingen.de.ibm.com>
2022-05-12 3:29 ` Jason Wang
2022-05-07 7:19 ` [PATCH V4 7/9] virtio: allow to unbreak virtqueue Jason Wang
2022-05-07 7:19 ` [PATCH V4 8/9] virtio: harden vring IRQ Jason Wang
2022-05-10 11:32 ` Michael S. Tsirkin
2022-05-11 2:40 ` Jason Wang
2022-05-11 8:44 ` Cornelia Huck
2022-05-11 9:27 ` Jason Wang
2022-05-11 12:49 ` Halil Pasic
2022-05-12 3:27 ` Jason Wang
2022-05-07 7:19 ` [PATCH V4 9/9] virtio: use WARN_ON() to warning illegal status value Jason Wang
2022-05-10 9:29 ` [PATCH V4 0/9] rework on the IRQ hardening of virtio Cornelia Huck
2022-05-11 2:22 ` Jason Wang
2022-05-11 14:01 ` Halil Pasic [this message]
2022-05-12 3:31 ` Jason Wang
2022-05-16 11:20 ` Halil Pasic
2022-05-16 14:25 ` Michael S. Tsirkin
2022-05-17 1:00 ` Jason Wang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220511160147.46cbf2fb.pasic@linux.ibm.com \
--to=pasic@linux.ibm.com \
--cc=cohuck@redhat.com \
--cc=eperezma@redhat.com \
--cc=jasowang@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lulu@redhat.com \
--cc=maz@kernel.org \
--cc=mst@redhat.com \
--cc=paulmck@kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).