From: Herbert Xu <herbert@gondor.apana.org.au>
To: Amos Kong <akong@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-crypto@vger.kernel.org, m@bues.ch, mpm@selenic.com,
amit.shah@redhat.com
Subject: Re: [PATCH v5 REPOST 0/6] fix hw_random stuck
Date: Mon, 22 Dec 2014 23:05:16 +1100 [thread overview]
Message-ID: <20141222120515.GD21045@gondor.apana.org.au> (raw)
In-Reply-To: <1418028640-4891-1-git-send-email-akong@redhat.com>
On Mon, Dec 08, 2014 at 04:50:34PM +0800, Amos Kong wrote:
> When I hotunplug a busy virtio-rng device or try to access
> hwrng attributes in non-smp guest, it gets stuck.
>
> My hotplug tests:
>
> | test 0:
> | hotunplug rng device from qemu monitor
> |
> | test 1:
> | guest) # dd if=/dev/hwrng of=/dev/null &
> | hotunplug rng device from qemu monitor
> |
> | test 2:
> | guest) # dd if=/dev/random of=/dev/null &
> | hotunplug rng device from qemu monitor
> |
> | test 4:
> | guest) # dd if=/dev/hwrng of=/dev/null &
> | cat /sys/devices/virtual/misc/hw_random/rng_*
> |
> | test 5:
> | guest) # dd if=/dev/hwrng of=/dev/null
> | cancel dd process after 10 seconds
> | guest) # dd if=/dev/hwrng of=/dev/null &
> | hotunplug rng device from qemu monitor
> |
> | test 6:
> | use a fifo as rng backend, execute test 0 ~ 5 with no input of fifo
All applied. Thanks a lot!
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
prev parent reply other threads:[~2014-12-22 12:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-08 8:50 [PATCH v5 REPOST 0/6] fix hw_random stuck Amos Kong
2014-12-08 8:50 ` [PATCH v5 REPOST 1/6] hw_random: place mutex around read functions and buffers Amos Kong
2017-09-25 22:00 ` Dmitry Torokhov
[not found] ` <CAKdAkRSF1qJv_03PJh44gkQ7NOJ3ccW2EwPckGvch=iUYY1-Qw@mail.gmail.com>
2017-09-26 6:36 ` Pankaj Gupta
[not found] ` <369186187.14365871.1506407817157.JavaMail.zimbra@redhat.com>
2017-09-26 16:52 ` Dmitry Torokhov
[not found] ` <20170926165241.GB14833@dtor-ws>
2017-09-27 6:35 ` Pankaj Gupta
2014-12-08 8:50 ` [PATCH v5 REPOST 2/6] hw_random: move some code out mutex_lock for avoiding underlying deadlock Amos Kong
2014-12-08 8:50 ` [PATCH v5 REPOST 3/6] hw_random: use reference counts on each struct hwrng Amos Kong
2014-12-08 8:50 ` [PATCH v5 REPOST 4/6] hw_random: fix unregister race Amos Kong
2014-12-08 8:50 ` [PATCH v5 REPOST 5/6] hw_random: don't double-check old_rng Amos Kong
2014-12-08 8:50 ` [PATCH v5 REPOST 6/6] hw_random: don't init list element we're about to add to list Amos Kong
2014-12-22 12:05 ` Herbert Xu [this message]
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