diff for duplicates of <20190923234013.GA28085@blackberry> diff --git a/a/1.txt b/N1/1.txt index 7ac5f45..a21f31e 100644 --- a/a/1.txt +++ b/N1/1.txt @@ -4,7 +4,7 @@ On Wed, Sep 11, 2019 at 05:31:55PM -0500, Michael Roth wrote: > > guest A: > - 224GB of memory -> - 56 VCPUs (sockets=1,cores(,threads=2), where: +> - 56 VCPUs (sockets=1,cores=28,threads=2), where: > VCPUs 0-1 are pinned to CPUs 0-3, > VCPUs 2-3 are pinned to CPUs 4-7, > ... @@ -31,7 +31,7 @@ On Wed, Sep 11, 2019 at 05:31:55PM -0500, Michael Roth wrote: > and 5.3-rc5): > > [ 1253.183290] rcu: INFO: rcu_sched self-detected stall on CPU -> [ 1253.183319] rcu: 124-....: (5250 ticks this GP) idle\x10a/1/0x4000000000000002 softirqT08/5408 fqs\x1941 +> [ 1253.183319] rcu: 124-....: (5250 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=1941 > [ 1256.287426] watchdog: BUG: soft lockup - CPU#105 stuck for 23s! [CPU 52/KVM:19709] > [ 1264.075773] watchdog: BUG: soft lockup - CPU#24 stuck for 23s! [worker:19913] > [ 1264.079769] watchdog: BUG: soft lockup - CPU#31 stuck for 23s! [worker:20331] @@ -39,13 +39,13 @@ On Wed, Sep 11, 2019 at 05:31:55PM -0500, Michael Roth wrote: > [ 1264.131773] watchdog: BUG: soft lockup - CPU#64 stuck for 23s! [avocado:19525] > [ 1280.408480] watchdog: BUG: soft lockup - CPU#124 stuck for 22s! [ksmd:791] > [ 1316.198012] rcu: INFO: rcu_sched self-detected stall on CPU -> [ 1316.198032] rcu: 124-....: (21003 ticks this GP) idle\x10a/1/0x4000000000000002 softirqT08/5408 fqs‚43 +> [ 1316.198032] rcu: 124-....: (21003 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=8243 > [ 1340.411024] watchdog: BUG: soft lockup - CPU#124 stuck for 22s! [ksmd:791] > [ 1379.212609] rcu: INFO: rcu_sched self-detected stall on CPU -> [ 1379.212629] rcu: 124-....: (36756 ticks this GP) idle\x10a/1/0x4000000000000002 softirqT08/5408 fqs\x14714 +> [ 1379.212629] rcu: 124-....: (36756 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=14714 > [ 1404.413615] watchdog: BUG: soft lockup - CPU#124 stuck for 22s! [ksmd:791] > [ 1442.227095] rcu: INFO: rcu_sched self-detected stall on CPU -> [ 1442.227115] rcu: 124-....: (52509 ticks this GP) idle\x10a/1/0x4000000000000002 softirqT08/5408 fqs!403 +> [ 1442.227115] rcu: 124-....: (52509 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=21403 > [ 1455.111787] INFO: task worker:19907 blocked for more than 120 seconds. > [ 1455.111822] Tainted: G L 5.3.0-rc5-mdr-vanilla+ #1 > [ 1455.111833] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. @@ -150,7 +150,7 @@ On Wed, Sep 11, 2019 at 05:31:55PM -0500, Michael Roth wrote: > ->105: message[CALL_FUNCTION] = 1 > 105: ppc_msgsnd_sync()/smp_mb() > 105: ppc_msgsnd() -> 42 -> 42: local_paca->kvm_hstate.host_ipi = 0 // IPI ignored +> 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored > 105: // hangs waiting on 42 to process messages/call_single_queue > > This can be prevented with an smp_mb() at the beginning of @@ -184,7 +184,7 @@ On Wed, Sep 11, 2019 at 05:31:55PM -0500, Michael Roth wrote: > 42: // returns to executing guest > 105: ppc_msgsnd_sync()/smp_mb() > 105: ppc_msgsnd() -> 42 -> 42: local_paca->kvm_hstate.host_ipi = 0 // IPI ignored +> 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored > 105: // hangs waiting on 42 to process messages/call_single_queue > > Fixing this scenario would require an smp_mb() *after* clearing diff --git a/a/content_digest b/N1/content_digest index 9c8a8c3..4823c4a 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -1,7 +1,7 @@ "ref\020190911223155.16045-1-mdroth@linux.vnet.ibm.com\0" "From\0Paul Mackerras <paulus@ozlabs.org>\0" "Subject\0Re: [PATCH v2] KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag\0" - "Date\0Mon, 23 Sep 2019 23:40:13 +0000\0" + "Date\0Tue, 24 Sep 2019 09:40:13 +1000\0" "To\0Michael Roth <mdroth@linux.vnet.ibm.com>\0" "Cc\0linuxppc-dev@lists.ozlabs.org" kvm-ppc@vger.kernel.org @@ -14,7 +14,7 @@ "> \n" "> guest A:\n" "> - 224GB of memory\n" - "> - 56 VCPUs (sockets=1,cores(,threads=2), where:\n" + "> - 56 VCPUs (sockets=1,cores=28,threads=2), where:\n" "> VCPUs 0-1 are pinned to CPUs 0-3,\n" "> VCPUs 2-3 are pinned to CPUs 4-7,\n" "> ...\n" @@ -41,7 +41,7 @@ "> and 5.3-rc5):\n" "> \n" "> [ 1253.183290] rcu: INFO: rcu_sched self-detected stall on CPU\n" - "> [ 1253.183319] rcu: 124-....: (5250 ticks this GP) idle\020a/1/0x4000000000000002 softirqT08/5408 fqs\03141\n" + "> [ 1253.183319] rcu: 124-....: (5250 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=1941\n" "> [ 1256.287426] watchdog: BUG: soft lockup - CPU#105 stuck for 23s! [CPU 52/KVM:19709]\n" "> [ 1264.075773] watchdog: BUG: soft lockup - CPU#24 stuck for 23s! [worker:19913]\n" "> [ 1264.079769] watchdog: BUG: soft lockup - CPU#31 stuck for 23s! [worker:20331]\n" @@ -49,13 +49,13 @@ "> [ 1264.131773] watchdog: BUG: soft lockup - CPU#64 stuck for 23s! [avocado:19525]\n" "> [ 1280.408480] watchdog: BUG: soft lockup - CPU#124 stuck for 22s! [ksmd:791]\n" "> [ 1316.198012] rcu: INFO: rcu_sched self-detected stall on CPU\n" - "> [ 1316.198032] rcu: 124-....: (21003 ticks this GP) idle\020a/1/0x4000000000000002 softirqT08/5408 fqs\342\200\23243\n" + "> [ 1316.198032] rcu: 124-....: (21003 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=8243\n" "> [ 1340.411024] watchdog: BUG: soft lockup - CPU#124 stuck for 22s! [ksmd:791]\n" "> [ 1379.212609] rcu: INFO: rcu_sched self-detected stall on CPU\n" - "> [ 1379.212629] rcu: 124-....: (36756 ticks this GP) idle\020a/1/0x4000000000000002 softirqT08/5408 fqs\024714\n" + "> [ 1379.212629] rcu: 124-....: (36756 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=14714\n" "> [ 1404.413615] watchdog: BUG: soft lockup - CPU#124 stuck for 22s! [ksmd:791]\n" "> [ 1442.227095] rcu: INFO: rcu_sched self-detected stall on CPU\n" - "> [ 1442.227115] rcu: 124-....: (52509 ticks this GP) idle\020a/1/0x4000000000000002 softirqT08/5408 fqs!403\n" + "> [ 1442.227115] rcu: 124-....: (52509 ticks this GP) idle=10a/1/0x4000000000000002 softirq=5408/5408 fqs=21403\n" "> [ 1455.111787] INFO: task worker:19907 blocked for more than 120 seconds.\n" "> [ 1455.111822] Tainted: G L 5.3.0-rc5-mdr-vanilla+ #1\n" "> [ 1455.111833] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n" @@ -160,7 +160,7 @@ "> ->105: message[CALL_FUNCTION] = 1\n" "> 105: ppc_msgsnd_sync()/smp_mb()\n" "> 105: ppc_msgsnd() -> 42\n" - "> 42: local_paca->kvm_hstate.host_ipi = 0 // IPI ignored\n" + "> 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored\n" "> 105: // hangs waiting on 42 to process messages/call_single_queue\n" "> \n" "> This can be prevented with an smp_mb() at the beginning of\n" @@ -194,7 +194,7 @@ "> 42: // returns to executing guest\n" "> 105: ppc_msgsnd_sync()/smp_mb()\n" "> 105: ppc_msgsnd() -> 42\n" - "> 42: local_paca->kvm_hstate.host_ipi = 0 // IPI ignored\n" + "> 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored\n" "> 105: // hangs waiting on 42 to process messages/call_single_queue\n" "> \n" "> Fixing this scenario would require an smp_mb() *after* clearing\n" @@ -221,4 +221,4 @@ "\n" Acked-by: Paul Mackerras <paulus@ozlabs.org> -18a0eb392c6297a8c6750b26be551a5261eb0f1f0505addcfb2a19d102d09c25 +c9ffd38cc5cd98cd436529fe07f3e3492984545d3ec19e54122589872c3b121c
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