Hi, I am also facing the same problem with this driver. I'm using Adaptec ASC-1045 which uses the Marvell 88SE6440 chip. In my case, this could be reproduced with RAID-5 configured with 3 SATA drives. While analysing the problem, it looks like the prd table is getting corrupted in the SATA path triggers the issue. ----mvs_sas.c--- 726 #ifndef DISABLE_HOTPLUG_DMA_FIX 727 if (task->data_dir == DMA_FROM_DEVICE) 728 MVS_CHIP_DISP->dma_fix(asi->bulk_buffer_dma, 729 TRASH_BUCKET_SIZE, tei->n_elem, buf_prd); 730 #endif ----------- The hang issue doesn't occur after enabling DISABLE_HOTPLUG_DMA_FIX in mvs_sas.h file. Please let me know if this fix solves the issue. Btw, I'm not sure about the reason why this macro is disabled by default. Someone who is aware about this change can throw light on this. Meanwhile, I'm running some overnight test to see if this workaround/fix is harmless. Sorry for the disclaimer that will be appended by my organization's mail server. Thanks, Meena, HCL Technologies. On Wed, Oct 14, 2009 at 7:55 AM, Christian Vilhelm <christian.vilhelm@xxxxxxxxxxxxxx> wrote: > > Thomas Fjellstrom wrote: >> >> On Tue October 13 2009, andy yan wrote: >>> >>> I will send you a patch for debugging this issue, please help to try and >>> send back the log, thanks! >> >> I will do whatever I can to help get this resolved :) I have some C skills, but no kernel/device driver experience, so at the very least I should be able to do builds and make small changes if needed, in addition to patching and endless reboots ;D > > I'm also willing to help. > The card is not on a production server and the disks connected to the card do not contain any valuable data so I can make any test wanted. > FWIW I have the same card and the same problems. I'll be travelling the next two weeks +, but after that I can do tests etc. (Actually I'll probably also be purchasing one of those known-good LSI PCIe SAS cards discussed in the very recent xfs+md slowdown thread. Suggest you check it out if you haven't read it.) - Kristleifur -- To unsubscribe from this list: 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 DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any mail and attachments please check them for viruses and defect. ----------------------------------------------------------------------------------------------------------------------- -- To unsubscribe from this list: 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
