On Thu, Sep 07, 2023 at 07:34:44AM -0700, Paul E. McKenney wrote: > On Thu, Sep 07, 2023 at 09:17:15AM -0400, Joel Fernandes wrote: > > Hi, > > Just started seeing this on 6.5 stable. It is new and first occurrence: > > > > TREE04 no success message, 234 successful version messages > > [033mWARNING: [mTREE04 GP HANG at 14 torture stat 2 > > [ 38.371120] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g1253 > > f0x0 ->state 0x2 cpu 6 > > [ 38.388342] Call Trace: > > [ 53.741039] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g3637 > > f0x2 ->state 0x2 cpu 6 > > [ 69.093462] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g5501 > > f0x0 ->state 0x2 cpu 6 > > [ 84.450028] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g10505 > > f0x0 ->state 0x2 cpu 6 > > [ 99.815871] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g13781 > > f0x0 ->state 0x2 cpu 6 > > [ 115.166476] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g16544 > > f0x0 ->state 0x2 cpu 6 > > [ 130.550116] ??? Writer stall state RTWS_COND_SYNC_FULL(10) g18941 > > f0x0 ->state 0x2 cpu 6 > > [..] > > > > All logs: > > http://box.joelfernandes.org:9080/job/rcutorture_stable/job/linux-6.5.y/17/artifact/tools/testing/selftests/rcutorture/res/2023.09.07-04.10.25/TREE04/ > > Huh. Does this happen for you in v6.5 mainline? > > Both the code under test (full-state polled grace periods) and the > rcutorture test code are fairly new, so there is some reason for general > suspicion. ;-) I happened to hit this again but this time on 6.1 stable and TREE05: Here are some logs: http://box.joelfernandes.org:9080/job/rcutorture_stable/job/linux-6.1.y/139/artifact/tools/testing/selftests/rcutorture/res/2023.09.15-04.02.48/TREE05/ I am planning to look closer soon. thanks, - Joel
