On Thu, 22 Aug 2013, Kenneth D. Merry wrote: > > > Fix mps(4) driver breakage that came in in change 253550 that > > > manifested itself in out of chain frame conditions. > > > > > > When the driver ran out of chain frames, the request in question > > > would get completed early, and go through mpssas_scsiio_complete().
> > what is real impact of the bug? > > Your system will essentially hang, certainly as far as anything connected > to the controller in question. [snip] > 5. Look for an out of chain frames message on the console. To see how far > you are towards using the chain frames, run 'sysctl dev.mps'. You can see > how many chain frames you have free, and how many requests have failed. > > This change just needs to be merged along with the other changes to avoid > having the regression in stable. Thank you very much for the explanation. We use a couple of servers with mps (and many spindles there), all on stable/9 from this summer, and you commit turns on an alarm light in my head ;) -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: ma...@freebsd.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- ma...@rinet.ru *** ------------------------------------------------------------------------ _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
