Re: [PATCH] block: fix residual byte count handling

[Tejun Heo <htejun@gmail.com>]

Mike Galbraith wrote:
> On Tue, 2008-03-04 at 10:35 +0100, Jens Axboe wrote:
> 
>> Looks excellent to me, has a variant of this been tested as OK by the
>> users reporting the regression?
> 
> K3b burning seems to be a nogo here.  This is git pulled this morning
> though, so it's a somewhat different tree than previously tested fwtw.
> 
> [  136.440021] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> [  136.440043] ata1.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
> [  136.440045]          cdb 51 00 00 00 00 00 00 00  02 00 00 00 00 00 00 00
> [  136.440047]          res 58/00:02:00:02:00/00:00:00:00:00/b0 Emask 0x2 (HSM violation)
> [  136.440053] ata1.01: status: { DRDY DRQ }
> [  136.440086] ata1: soft resetting link
> [  165.327627] ata1.01: qc timeout (cmd 0xa1)
> [  165.327627] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
> [  165.327627] ata1.01: revalidation failed (errno=-5)
> [  165.327627] ata1: failed to recover some devices, retrying in 5 secs
> [  177.272373] ata1: port is slow to respond, please be patient (Status 0x80)
> [  180.388879] ata1: device not ready (errno=-16), forcing hardreset
> [  180.388879] ata1: soft resetting link
> [  210.832471] ata1.01: qc timeout (cmd 0xa1)
> [  210.832471] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
> [  210.832471] ata1.01: revalidation failed (errno=-5)
> [  210.832471] ata1: failed to recover some devices, retrying in 5 secs
> [  223.392899] ata1: port is slow to respond, please be patient (Status 0x80)
> [  225.920376] ata1: device not ready (errno=-16), forcing hardreset
> [  225.920376] ata1: soft resetting link
> [  256.542565] ata1.01: qc timeout (cmd 0xa1)
> [  256.542565] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
> [  256.542565] ata1.01: revalidation failed (errno=-5)
> [  256.542565] ata1.01: disabled

Aiee... device going down after timing out on READ_DISC_INFO.  That's
gruesome.  Can you please try the other patches?

Thanks.

-- 
tejun