On Wed, Oct 29, 2014 at 09:08:46AM -0600, Jens Axboe wrote: > >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? cciss does use scsi for CDROMs and other external devices, it is a bit of a mess. Meelis, did you also test scsi-mq on 3.17 and this is a regression, or was 3.18-rc2 the first kernel you tested? -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
