linux-kernel - Re: [PATCH v5 REPOST 0/6] fix hw

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Message-ID: <20141222120515.GD21045@gondor.apana.org.au>
Date:	Mon, 22 Dec 2014 23:05:16 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Amos Kong <akong@...hat.com>
Cc:	linux-crypto@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, rusty@...tcorp.com.au,
	kvm@...r.kernel.org, m@...s.ch, mpm@...enic.com,
	amit.shah@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 REPOST 0/6] fix hw_random stuck

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@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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