> On 2014-10-29 05:46, Meelis Roos wrote:
> > > I tried 3.18-rc2 with blk-mq default on on HP ProLiant DL380 G3 (with HP
> > > CCISS RAID controller). It fails late in the bootup with "task
> > > scsi_eh_1:720 blocked for more than 120 seconds." messages.
> > >
> > > Booting with scsi_mod.use_blk_mq=0 fixes the problem.
> >
> > Another test server with MPT SCSI RAID has similar problem,
> > scsi_mode.use_blk_mq=0 cures it but I can not get good trace (no serail
> > console). 3.18.0-rc2-00043-gf7e87a4 was tested there.
> 
> The first issue looks like scsi cdrom and error handling, it must be leaking
> requests hence we hang on allocation of a new one. cciss doesn't use blk_mq
> regardless of the scsi setting. Does the mpt box also have a libata driven
> cdrom?

Yes, it does.

-- 
Meelis Roos (mr...@linux.ee)
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