Pawel Jakub Dawidek wrote: > On Sat, Dec 05, 2009 at 01:40:51PM +0000, Alexander Motin wrote: >> Author: mav >> Date: Sat Dec 5 13:40:51 2009 >> New Revision: 200121 >> URL: http://svn.freebsd.org/changeset/base/200121 >> >> Log: >> Do not ignore device interrupt if bus mastering is still active. It is >> normal in case of media read error and some ATAPI cases, when transfer size >> is unknown beforehand. PCI ATA BM specification tells that in case of such >> underrun driver should just manually stop DMA engine. DMA engine should >> same time guarantie that all bus mastering transfers completed at the >> moment >> of driver reads interrupt flag asserted. >> This change should fix interrupt storms and command timeouts in many cases. >> >> PR: kern/103602, sparc64/121539, kern/133122, kern/139654 > > I've a box where I see interrupt storm on. This is 8-STABLE with this > patch applied.
Pawel found that it was not ATA issue, but USB. Fixed. -- Alexander Motin _______________________________________________ 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"
