Re: [Qemu-devel] qemu-system-arm I/O problems

Re: [Qemu-devel] qemu-system-arm I/O problems

[Peter Maydell]

On 29 June 2012 14:45, Peter Maydell <peter.maydell@linaro.org> wrote:
> On 25 June 2012 16:47, solar <solar@strawberrycupcak.es> wrote:
>> QEMU emulator version 1.1.0, Copyright (c) 2003-2008 Fabrice Bellard
>>
>> parameters used: qemu-system-arm -M versatilepb -m 256 -net nic -net
>> user,hostfwd=tcp::40022-:22 -nographic -hda debian-6-armel.img -kernel
>> vmlinuz-2.6.32-5-versatile -initrd initrd.img-2.6.32-5-versatile -append
>> "root=/dev/sda1 console=ttyAMA0"
>
>> Once apt starts to do disk I/O the kernel throws numerous SCSI errors:
>> [  165.292240] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK
>> driverbyte=DRIVER_SENSE
>> [  165.292653] sd 0:0:0:0: [sda] Sense Key : Aborted Command [current]
>> [  165.292950] sd 0:0:0:0: [sda] Add. Sense: I/O process terminated
>> [  165.293197] sd 0:0:0:0: [sda] CDB: Write(10): 2a 00 01 2d fd 40 00 02 a8
>> 00
>> [  165.293573] end_request: I/O error, dev sda, sector 19791168
>> [  165.293772] Buffer I/O error on device sda1, logical block 2473640
>> [  165.293900] lost page write due to I/O error on sda1
>
> I can reproduce this with v1.1.0, but not with master, which suggests
> it has been fixed at some point. I might try to bisect to find out
> what exactly the fix was.

Bisection suggests commit 425b01487 fixed this, although I am not
sure exactly why it would. Paolo?

-- PMM

Re: [Qemu-devel] qemu-system-arm I/O problems

[Paolo Bonzini]

Il 02/07/2012 12:43, Peter Maydell ha scritto:
>>> >> Once apt starts to do disk I/O the kernel throws numerous SCSI errors:
>>> >> [  165.292240] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK
>>> >> driverbyte=DRIVER_SENSE
>>> >> [  165.292653] sd 0:0:0:0: [sda] Sense Key : Aborted Command [current]
>>> >> [  165.292950] sd 0:0:0:0: [sda] Add. Sense: I/O process terminated
>>> >> [  165.293197] sd 0:0:0:0: [sda] CDB: Write(10): 2a 00 01 2d fd 40 00 02 a8
>>> >> 00
>>> >> [  165.293573] end_request: I/O error, dev sda, sector 19791168
>>> >> [  165.293772] Buffer I/O error on device sda1, logical block 2473640
>>> >> [  165.293900] lost page write due to I/O error on sda1
>> >
>> > I can reproduce this with v1.1.0, but not with master, which suggests
>> > it has been fixed at some point. I might try to bisect to find out
>> > what exactly the fix was.
> Bisection suggests commit 425b01487 fixed this, although I am not
> sure exactly why it would. Paolo?

This must be a wrong bisection... perhaps another patch in the same series?

Paolo

Re: [Qemu-devel] qemu-system-arm I/O problems

[Peter Maydell]

On 2 July 2012 13:25, Paolo Bonzini <pbonzini@redhat.com> wrote:
> Il 02/07/2012 12:43, Peter Maydell ha scritto:
>>> > I can reproduce this with v1.1.0, but not with master, which suggests
>>> > it has been fixed at some point. I might try to bisect to find out
>>> > what exactly the fix was.
>> Bisection suggests commit 425b01487 fixed this, although I am not
>> sure exactly why it would. Paolo?
>
> This must be a wrong bisection...

Hmm, seems to be. I'm not sure I care enough to spend more time
trying to track it down since we've apparently fixed whatever it was...

-- PMM