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?
--
Jens Axboe
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