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List:       linux-virtualization
Subject:    Re: [PATCH v5 REPOST 0/6] fix hw_random stuck
From:       Herbert Xu <herbert () gondor ! apana ! org ! au>
Date:       2014-12-22 12:05:16
Message-ID: 20141222120515.GD21045 () gondor ! apana ! org ! au
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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
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