On Thursday, September 29, 2005 12:59 PM, Chen, Kenneth W wrote: > > Something happened in between kernel 2.6.12 and 2.6.14-rc2, where > disk performance went 20X slower on the latest release kernel. I > suspect it has something to do with the fusion driver. This showed > up in the boot log: "mptscsih: ioc0: DV: Release failed." is it > significant? > > There have been several post circulating about the "release failed" issue. I thought I saw an email recently from someone at Intel that had root caused the problem. I'm been trying to find that all day to find that email. I believe it was on this or the linux-kernel forums. Had you seen it? We need to root cause that, however I'm very much burried in SAS. Anyways the plan is to eventually go to SPI transport. Have you seen this post by James? http://marc.theaimsgroup.com/?l=linux-scsi&m=112879629201766&w=2 I have it on my todo list, and plan to review this SPI updates sometime this week. Perhaps you can try this patch out and let us (and James) whether its solved. Eric Moore - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
