All, On Friday, I installed and tested the pre- 3.7 raid5 trim kernel, 3.6.10 kernel. I was able to create an xfs filesystem on a RAID5 SSD array without the kernel panic. This leads me to believe that the raid5 trim feature added in kernel 3.7 may have caused the issue I reported. Regards, Michael -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Jes Sorensen Sent: Monday, October 21, 2013 5:29 AM To: Shaohua Li Cc: stan@xxxxxxxxxxxxxxxxx; linux-raid@xxxxxxxxxxxxxxx; NeilBrown; Jeff Moyer Subject: Re: raid5 trim OOPS / use after free? Shaohua Li <ShLi@xxxxxxxxxxxx> writes: > On 10/18/13 2:03 PM, "Jes Sorensen" <Jes.Sorensen@xxxxxxxxxx> wrote: > >>Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> writes: >>> On 10/17/2013 4:58 PM, Jes Sorensen wrote: >>>> Hi, >>>> >>>> I have been trying out the trim code in recent kernels and I am >>>> consistently seeing crashes with the raid5 trim implementation. >>>> >>>> I am seeing 3-4 different OOPS outputs which are very different in >>>>their output. This makes me suspect this is a memory corruption of >>>>use after free problem? >>>> >>>> Basically I have a system with an AHCI controller and 4 SATA SSD >>>> drives hooked up to it. I create a raid5 and then run mkfs.ext4 on >>>> it and the fireworks display starts. >>>> >>>> I first saw this with an older kernel with some backports applied, >>>>but I am able to reproduce this with the current top of tree out of >>>>Linus' >>>> tree. >>>> >>>> Any ideas? >>> >>> See a nearly identical problem posted to this list yesterday: >>> >>> http://www.spinics.net/lists/raid/msg44686.html >> >>Looks the same - I believe I have seen that variation of the problem >>as well. > > Ok, looks we have some problems with request merge in SCSI. I just > posted some patches to linux-raid maillist, please test and report back. Hi Shaohua, Thanks for the quick reply. I will test them as soon as I can, but it probably wont be until the end of the week. Regards, Jes -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
