On 2022/12/26 15:47, lijiang wrote: > On Mon, Dec 26, 2022 at 12:42 PM HAGIO KAZUHITO(萩尾 一仁) <k-hagio-ab@xxxxxxx> > wrote: > >> On 2022/12/22 16:50, lijiang wrote: >>> After applying the patch, I got another error based on the latest kernel >>> commit 9d2f6060fe4c3b49d0cdc1dce1c99296f33379c8: >>> >>> crash> kmem -S filp >>> CACHE OBJSIZE ALLOCATED TOTAL SLABS SSIZE NAME >>> ffff9d80c030a100 232 1125 3936 123 8k filp >>> CPU 0 KMEM_CACHE_CPU: >>> ffff9d81e7a38470 >>> CPU 0 SLAB: >>> SLAB MEMORY NODE TOTAL ALLOCATED FREE >>> fffff0f3841a7700 ffff9d80c69dc000 0 32 10 22 >>> FREE / [ALLOCATED] >>> kmem: filp: slab: fffff0f3841a7700 invalid freepointer: 4404c55079ecb7fe >>> CPU 1 KMEM_CACHE_CPU: >>> ffff9d81e7a78470 >>> CPU 1 SLAB: >>> SLAB MEMORY NODE TOTAL ALLOCATED FREE >>> fffff0f38446a600 ffff9d80d1a98000 0 32 0 32 >>> FREE / [ALLOCATED] >>> ... >>> >>> And this issue can not always be reproduced, I have tested it more than >> ten >>> times, the above error can be observed on my side, maybe one or two >> times. >>> >>> But anyway, I'm curious if this is another issue. Could you please also >>> double check it? >> >> Thank you for testing. >> >> I have not reproduced it with kdump, but did it with live system when >> repeating this: >> >> crash> kmem -S > /tmp/kmem-S >> crash> kmem -S > /tmp/kmem-S >> ... >> crash> kmem -S > /tmp/kmem-S >> kmem: kmalloc-16: slab: ffffdb3bc440bcc0 invalid freepointer: >> d3ec64863a077e7c >> >> As you say, it does not always happen, so it will be a timing issue or >> corner case. Maybe there was a change in managing freepointer list, >> but so far I'm not sure what the cause is. >> >> > Theoretically, this issue can also be reproduced on kdump at a certain time > point. > > >> Anyway, I think it's not due to the offset change of slab.slab_list and >> not the same issue. Can we apply this and look into it later? >> >> > Yes, I agree that it might be another issue. Let's leave it there. > For the patch: Ack. Thanks, applied. https://github.com/crash-utility/crash/commit/d83df2fb66cd77877d365fda32cd45c531796599 -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki
