* Re: ahci: work around ATI SB600 h/w quirk [not found] <200803060259.m262x3tp008780@hera.kernel.org> @ 2008-03-06 8:18 ` Jens Axboe 0 siblings, 0 replies; only message in thread From: Jens Axboe @ 2008-03-06 8:18 UTC (permalink / raw) To: Linux Kernel Mailing List; +Cc: jeff On Thu, Mar 06 2008, Linux Kernel Mailing List wrote: > Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a878539ef994787c447a98c2e3ba0fe3dad984ec > Commit: a878539ef994787c447a98c2e3ba0fe3dad984ec > Parent: 6ddd68615ae9b21096545d7d6ab0f04113ae8b42 > Author: Jeff Garzik <jeff@garzik.org> > AuthorDate: Thu Feb 28 15:43:48 2008 -0500 > Committer: Jeff Garzik <jeff@garzik.org> > CommitDate: Wed Mar 5 07:53:06 2008 -0500 > > ahci: work around ATI SB600 h/w quirk > > This addresses the recent ATI SB600 errata, where the hardware does > not like 256-length PRD entries during FPDMA (aka NCQ). > > It hurts performance on SB600, but it is more important to get a > correct patch eliminating the data corruption/lockups, and then later > on tune for performance. > > We simply limit each command to a maximum of 255 sectors, on SB600. Why not limit it to 255 segments, if that's the real issue? -- Jens Axboe ^ permalink raw reply [flat|nested] only message in thread
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2008-03-06 8:18 ` ahci: work around ATI SB600 h/w quirk Jens Axboe
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