Created attachment 217422 [details] /var/crash/info.8(r363950M) Hi. I'm using 13.0-CURRENT r364441M on Dell XPS12 9Q33. (I'm using udf2 patched r364441.) This machine was panicked with the following messages. panic: deadlres_td_sleep_q: possible deadlock detected for 0xfffffe006408be00 (find), blocked for 1802043 ticks Yesterday, I was using r363950M and the same panic has occured. Vmcore was uploaded to the below. https://www.ish.org/files/vmcore.8.r363950M.xz https://www.ish.org/files/vmcore.9.r364441M.xz
Created attachment 217424 [details] /var/crash/info.9(r364441M)
Created attachment 217425 [details] /var/crash/core.txt.8(r363950M)
Created attachment 217426 [details] /var/crash/core.txt.9(r364441M)
Looking at core.txt.8: These prints are not the problem, but it would be nice to fix the drm driver not to do lock asserts during panic: WARNING !drm_modeset_is_locked(&plane->mutex) failed at /usr/local/sys/modules/drm-current-kmod/drivers/gpu/drm/drm_atomic_helper.c:821 #0 0xffffffff82ebb673 at linux_dump_stack+0x23 It's a shame deadlkres doesn't do something like print_lockchain(). That'd help diagnose these things. ps shows the only find process is blocked on nfs: 0 61433 61429 0 52 0 18540 5752 nfs D - 0:13.33 [find] There are several nfscl threads sleeping on nfscl, which indicates renewthread, i.e., probably we're waiting on a server that went away. I'd guess that's what find is also waiting on.
core.txt.9 shows the same.
How might we refine the summary line here? To distinguish this report from: * bug 243876 * bug 257291 * bug 264233 * bug 271945.