kern/93885 : ata(4) failure: SETFEATURES SET TRANSFER MODE semaphore timeout !! DANGER Will Robinson !!

[Eugene Grosbein]

The following reply was made to PR kern/93885; it has been noted by GNATS.

From: Eugene Grosbein <eugen at kuzbass.ru>
To: bug-followup at freebsd.org
Cc: Jason Spence <jspence at lightconsulting.com>, sos at freebsd.org
Subject: Re: kern/93885 : ata(4) failure: SETFEATURES SET TRANSFER MODE semaphore timeout !! DANGER Will Robinson !!
Date: Fri, 3 Mar 2006 23:02:10 +0700

 Hi!
 
 I've updated my sources to RELENG_6
 (and grabbed src/sys/dev/ata/ata-all.c,v 1.252.2.6), rebuild and booted
 new kernel.
 
 Now deadlock is gone but the system suffers from temporary delays
 accessing the drive. The kernel is signalling:
 
 ad4: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES ENABLE RCACHE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES ENABLE WCACHE taskqueue timeout - completing request directly
 ad4: WARNING - SET_MULTI taskqueue timeout - completing request directly
 ad4: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=100861733
 ad6: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=62118768
 ad4: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES ENABLE RCACHE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES ENABLE WCACHE taskqueue timeout - completing request directly
 ad4: WARNING - SET_MULTI taskqueue timeout - completing request directly
 ad4: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=100861989
 ad6: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=62184272
 ad4: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES ENABLE RCACHE taskqueue timeout - completing request directly
 ad4: WARNING - SETFEATURES ENABLE WCACHE taskqueue timeout - completing request directly
 ad4: WARNING - SET_MULTI taskqueue timeout - completing request directly
 ad4: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=100862853
 ad6: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=62352144
 
 Eugene Grosbein