[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback |
Date: |
Mon, 17 Sep 2018 13:48:06 +0200 |
User-agent: |
Mutt/1.9.1 (2017-09-22) |
Am 14.09.2018 um 19:38 hat Paolo Bonzini geschrieben:
> On 14/09/2018 19:14, Kevin Wolf wrote:
> >> As you mention, you could have a nested aio_poll() in the main thread,
> >> for example invoked from a bottom half, but in that case I'd rather
> >> track the caller that is creating the bottom half and see if it lacks a
> >> bdrv_ref/bdrv_unref (or perhaps it's even higher in the tree that is
> >> missing).
> > I went back to the commit where I first added the patch (it already
> > contained the ref/unref pair) and tried if I could reproduce a bug with
> > the pair removed. I couldn't.
> >
> > I'm starting to think that maybe I was just overly cautious with the
> > ref/unref. I may have confused the nested aio_poll() crash with a
> > different situation. I've dealt with so many crashes and hangs while
> > working on this series that it's quite possible.
>
> Are you going to drop the patch hen?
I think I can drop the ref/unref pair, but not the whole patch (whose
main point is reordering dec_in_flight vs. the AIO callback).
Kevin
- [Qemu-devel] [PATCH v2 10/17] block-backend: Fix potential double blk_delete(), (continued)
- [Qemu-devel] [PATCH v2 10/17] block-backend: Fix potential double blk_delete(), Kevin Wolf, 2018/09/13
- [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/13
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/13
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/13
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Fam Zheng, 2018/09/14
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/14
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/14
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/14
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback,
Kevin Wolf <=
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/17
- Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/17
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/17
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/17
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/17
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/18
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/18
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Kevin Wolf, 2018/09/18
- Re: [Qemu-devel] [Qemu-block] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Paolo Bonzini, 2018/09/19
Re: [Qemu-devel] [PATCH v2 11/17] block-backend: Decrease in_flight only after callback, Max Reitz, 2018/09/13