svn commit: r298011 - head/sys/cam/ata

[Dmitry Morozovsky]

On Fri, 15 Apr 2016, Warner Losh wrote:

> A shorter timeout dramatically cuts the length of time that the
> queue has to be frozen for error recovery. This allows one,
> in theory, to recover the system more quickly after a drive
> goes off into the weeds.

May be make some more generic changes?  Could we detect SSD vs spinning disk vs 
unknown and set timeouts accordigly to the nature of the underlying device?

> 
> Warner
> 
> 
> > On Apr 15, 2016, at 9:23 AM, Ronald Klop <ronald-lists at klop.ws> wrote:
> > 
> > Hello,
> > 
> > Out of curiosity, what are these big problems? Broken device or other things (timeouts/triggers/full queues) going on in the kernel?
> > 
> > Regards,
> > Ronald.
> > 
> > 
> > On Fri, 15 Apr 2016 00:13:46 +0200, Warner Losh <imp at freebsd.org> wrote:
> > 
> >> Author: imp
> >> Date: Thu Apr 14 22:13:46 2016
> >> New Revision: 298011
> >> URL: https://svnweb.freebsd.org/changeset/base/298011
> >> erLog:
> >>  Add a comment about why the timeout for flush was lowered to 5s.
> >> 
> >> Modified:
> >>  head/sys/cam/ata/ata_da.c
> >> 
> >> Modified: head/sys/cam/ata/ata_da.c
> >> ==============================================================================
> >> --- head/sys/cam/ata/ata_da.c	Thu Apr 14 22:13:44 2016	(r298010)
> >> +++ head/sys/cam/ata/ata_da.c	Thu Apr 14 22:13:46 2016	(r298011)
> >> @@ -912,6 +912,11 @@ adadump(void *arg, void *virtual, vm_off
> >> 	if (softc->flags & ADA_FLAG_CAN_FLUSHCACHE) {
> >> 		xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
> >> +		/*
> >> +		 * Tell the drive to flush its intenral cache. if we
> >> +		 * can't flush in 5s we have big problems. No need to
> >> +		 * wait the default 60s to detect problems.
> >> +		 */
> >> 		ccb.ccb_h.ccb_state = ADA_CCB_DUMP;
> >> 		cam_fill_ataio(&ccb.ataio,
> >> 				    0,
> >> _______________________________________________
> >> svn-src-all at freebsd.org mailing list
> >> https://lists.freebsd.org/mailman/listinfo/svn-src-all
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> 
> 

-- 
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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