August 2024 - Linux-stable-mirror

FAILED: patch "[PATCH] sched/core: Fix unbalance set_rq_online/offline() in" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x fe7a11c78d2a9bdb8b50afc278a31ac177000948 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081253-mulch-aluminum-faeb@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: fe7a11c78d2a ("sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate()") e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") 2558aacff858 ("sched/hotplug: Ensure only per-cpu kthreads run during hotplug") 565790d28b1e ("sched: Fix balance_callback()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From fe7a11c78d2a9bdb8b50afc278a31ac177000948 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:10 +0800 Subject: [PATCH] sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate() If cpuset_cpu_inactive() fails, set_rq_online() need be called to rollback. Fixes: 120455c514f7 ("sched: Fix hotplug vs CPU bandwidth control") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Link: https://lore.kernel.org/r/20240703031610.587047-5-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4d119e930beb..f3951e4a55e5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8022,6 +8022,7 @@ int sched_cpu_deactivate(unsigned int cpu) ret = cpuset_cpu_inactive(cpu); if (ret) { sched_smt_present_inc(cpu); + sched_set_rq_online(rq, cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/core: Fix unbalance set_rq_online/offline() in" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x fe7a11c78d2a9bdb8b50afc278a31ac177000948 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081254-eldest-guzzler-4fd0@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: fe7a11c78d2a ("sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate()") e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") 2558aacff858 ("sched/hotplug: Ensure only per-cpu kthreads run during hotplug") 565790d28b1e ("sched: Fix balance_callback()") c5511d03ec09 ("sched/smt: Make sched_smt_present track topology") 1f351d7f7590 ("sched: sched.h: make rq locking and clock functions available in stats.h") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From fe7a11c78d2a9bdb8b50afc278a31ac177000948 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:10 +0800 Subject: [PATCH] sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate() If cpuset_cpu_inactive() fails, set_rq_online() need be called to rollback. Fixes: 120455c514f7 ("sched: Fix hotplug vs CPU bandwidth control") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Link: https://lore.kernel.org/r/20240703031610.587047-5-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4d119e930beb..f3951e4a55e5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8022,6 +8022,7 @@ int sched_cpu_deactivate(unsigned int cpu) ret = cpuset_cpu_inactive(cpu); if (ret) { sched_smt_present_inc(cpu); + sched_set_rq_online(rq, cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/core: Fix unbalance set_rq_online/offline() in" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x fe7a11c78d2a9bdb8b50afc278a31ac177000948 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081253-promotion-degrading-c12f@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: fe7a11c78d2a ("sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate()") e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") 2558aacff858 ("sched/hotplug: Ensure only per-cpu kthreads run during hotplug") 565790d28b1e ("sched: Fix balance_callback()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From fe7a11c78d2a9bdb8b50afc278a31ac177000948 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:10 +0800 Subject: [PATCH] sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate() If cpuset_cpu_inactive() fails, set_rq_online() need be called to rollback. Fixes: 120455c514f7 ("sched: Fix hotplug vs CPU bandwidth control") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Link: https://lore.kernel.org/r/20240703031610.587047-5-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4d119e930beb..f3951e4a55e5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8022,6 +8022,7 @@ int sched_cpu_deactivate(unsigned int cpu) ret = cpuset_cpu_inactive(cpu); if (ret) { sched_smt_present_inc(cpu); + sched_set_rq_online(rq, cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/core: Fix unbalance set_rq_online/offline() in" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x fe7a11c78d2a9bdb8b50afc278a31ac177000948 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081252-snagged-scorecard-607c@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: fe7a11c78d2a ("sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate()") e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From fe7a11c78d2a9bdb8b50afc278a31ac177000948 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:10 +0800 Subject: [PATCH] sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate() If cpuset_cpu_inactive() fails, set_rq_online() need be called to rollback. Fixes: 120455c514f7 ("sched: Fix hotplug vs CPU bandwidth control") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Link: https://lore.kernel.org/r/20240703031610.587047-5-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4d119e930beb..f3951e4a55e5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8022,6 +8022,7 @@ int sched_cpu_deactivate(unsigned int cpu) ret = cpuset_cpu_inactive(cpu); if (ret) { sched_smt_present_inc(cpu); + sched_set_rq_online(rq, cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/core: Fix unbalance set_rq_online/offline() in" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x fe7a11c78d2a9bdb8b50afc278a31ac177000948 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081251-stowaway-serrated-199d@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: fe7a11c78d2a ("sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate()") e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From fe7a11c78d2a9bdb8b50afc278a31ac177000948 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:10 +0800 Subject: [PATCH] sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate() If cpuset_cpu_inactive() fails, set_rq_online() need be called to rollback. Fixes: 120455c514f7 ("sched: Fix hotplug vs CPU bandwidth control") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Link: https://lore.kernel.org/r/20240703031610.587047-5-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4d119e930beb..f3951e4a55e5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8022,6 +8022,7 @@ int sched_cpu_deactivate(unsigned int cpu) ret = cpuset_cpu_inactive(cpu); if (ret) { sched_smt_present_inc(cpu); + sched_set_rq_online(rq, cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/smt: Fix unbalance sched_smt_present dec/inc" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081240-safeguard-refract-aef2@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") 2558aacff858 ("sched/hotplug: Ensure only per-cpu kthreads run during hotplug") 565790d28b1e ("sched: Fix balance_callback()") c5511d03ec09 ("sched/smt: Make sched_smt_present track topology") 1f351d7f7590 ("sched: sched.h: make rq locking and clock functions available in stats.h") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:08 +0800 Subject: [PATCH] sched/smt: Fix unbalance sched_smt_present dec/inc I got the following warn report while doing stress test: jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0 Call Trace: <TASK> __static_key_slow_dec_cpuslocked+0x16/0x70 sched_cpu_deactivate+0x26e/0x2a0 cpuhp_invoke_callback+0x3ad/0x10d0 cpuhp_thread_fun+0x3f5/0x680 smpboot_thread_fn+0x56d/0x8d0 kthread+0x309/0x400 ret_from_fork+0x41/0x70 ret_from_fork_asm+0x1b/0x30 </TASK> Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(), the cpu offline failed, but sched_smt_present is decremented before calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so fix it by incrementing sched_smt_present in the error path. Fixes: c5511d03ec09 ("sched/smt: Make sched_smt_present track topology") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Reviewed-by: Chen Yu <yu.c.chen(a)intel.com> Reviewed-by: Tim Chen <tim.c.chen(a)linux.intel.com> Link: https://lore.kernel.org/r/20240703031610.587047-3-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index acc04ed9dbc2..949473e414f9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8009,6 +8009,7 @@ int sched_cpu_deactivate(unsigned int cpu) sched_update_numa(cpu, false); ret = cpuset_cpu_inactive(cpu); if (ret) { + sched_smt_present_inc(cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/smt: Fix unbalance sched_smt_present dec/inc" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081239-cubbyhole-wise-c8d1@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") 2558aacff858 ("sched/hotplug: Ensure only per-cpu kthreads run during hotplug") 565790d28b1e ("sched: Fix balance_callback()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:08 +0800 Subject: [PATCH] sched/smt: Fix unbalance sched_smt_present dec/inc I got the following warn report while doing stress test: jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0 Call Trace: <TASK> __static_key_slow_dec_cpuslocked+0x16/0x70 sched_cpu_deactivate+0x26e/0x2a0 cpuhp_invoke_callback+0x3ad/0x10d0 cpuhp_thread_fun+0x3f5/0x680 smpboot_thread_fn+0x56d/0x8d0 kthread+0x309/0x400 ret_from_fork+0x41/0x70 ret_from_fork_asm+0x1b/0x30 </TASK> Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(), the cpu offline failed, but sched_smt_present is decremented before calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so fix it by incrementing sched_smt_present in the error path. Fixes: c5511d03ec09 ("sched/smt: Make sched_smt_present track topology") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Reviewed-by: Chen Yu <yu.c.chen(a)intel.com> Reviewed-by: Tim Chen <tim.c.chen(a)linux.intel.com> Link: https://lore.kernel.org/r/20240703031610.587047-3-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index acc04ed9dbc2..949473e414f9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8009,6 +8009,7 @@ int sched_cpu_deactivate(unsigned int cpu) sched_update_numa(cpu, false); ret = cpuset_cpu_inactive(cpu); if (ret) { + sched_smt_present_inc(cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] sched/smt: Fix unbalance sched_smt_present dec/inc" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081238-catalyst-resident-aec1@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: e22f910a26cc ("sched/smt: Fix unbalance sched_smt_present dec/inc") 2558aacff858 ("sched/hotplug: Ensure only per-cpu kthreads run during hotplug") 565790d28b1e ("sched: Fix balance_callback()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 Mon Sep 17 00:00:00 2001 From: Yang Yingliang <yangyingliang(a)huawei.com> Date: Wed, 3 Jul 2024 11:16:08 +0800 Subject: [PATCH] sched/smt: Fix unbalance sched_smt_present dec/inc I got the following warn report while doing stress test: jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0 Call Trace: <TASK> __static_key_slow_dec_cpuslocked+0x16/0x70 sched_cpu_deactivate+0x26e/0x2a0 cpuhp_invoke_callback+0x3ad/0x10d0 cpuhp_thread_fun+0x3f5/0x680 smpboot_thread_fn+0x56d/0x8d0 kthread+0x309/0x400 ret_from_fork+0x41/0x70 ret_from_fork_asm+0x1b/0x30 </TASK> Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(), the cpu offline failed, but sched_smt_present is decremented before calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so fix it by incrementing sched_smt_present in the error path. Fixes: c5511d03ec09 ("sched/smt: Make sched_smt_present track topology") Cc: stable(a)kernel.org Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Reviewed-by: Chen Yu <yu.c.chen(a)intel.com> Reviewed-by: Tim Chen <tim.c.chen(a)linux.intel.com> Link: https://lore.kernel.org/r/20240703031610.587047-3-yangyingliang@huaweicloud… diff --git a/kernel/sched/core.c b/kernel/sched/core.c index acc04ed9dbc2..949473e414f9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8009,6 +8009,7 @@ int sched_cpu_deactivate(unsigned int cpu) sched_update_numa(cpu, false); ret = cpuset_cpu_inactive(cpu); if (ret) { + sched_smt_present_inc(cpu); balance_push_set(cpu, false); set_cpu_active(cpu, true); sched_update_numa(cpu, true);

1 year, 2 months

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FAILED: patch "[PATCH] drm/amd/display: prevent register access while in IPS" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 02593249fa11ef8d2ca780ef91962f81b04eeea0 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081250-agency-configure-c36c@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: 02593249fa11 ("drm/amd/display: prevent register access while in IPS") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 02593249fa11ef8d2ca780ef91962f81b04eeea0 Mon Sep 17 00:00:00 2001 From: Hamza Mahfooz <hamza.mahfooz(a)amd.com> Date: Mon, 3 Jun 2024 10:16:45 -0400 Subject: [PATCH] drm/amd/display: prevent register access while in IPS We can't read/write to DCN registers while in IPS. Since, that can cause the system to hang. So, before proceeding with the access in that scenario, force the system out of IPS. Cc: stable(a)vger.kernel.org # 6.6+ Reviewed-by: Roman Li <roman.li(a)amd.com> Signed-off-by: Hamza Mahfooz <hamza.mahfooz(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 6d468badb669..27acbe3ff57b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -11814,6 +11814,12 @@ void amdgpu_dm_trigger_timing_sync(struct drm_device *dev) mutex_unlock(&adev->dm.dc_lock); } +static inline void amdgpu_dm_exit_ips_for_hw_access(struct dc *dc) +{ + if (dc->ctx->dmub_srv && !dc->ctx->dmub_srv->idle_exit_counter) + dc_exit_ips_for_hw_access(dc); +} + void dm_write_reg_func(const struct dc_context *ctx, uint32_t address, u32 value, const char *func_name) { @@ -11824,6 +11830,8 @@ void dm_write_reg_func(const struct dc_context *ctx, uint32_t address, return; } #endif + + amdgpu_dm_exit_ips_for_hw_access(ctx->dc); cgs_write_register(ctx->cgs_device, address, value); trace_amdgpu_dc_wreg(&ctx->perf_trace->write_count, address, value); } @@ -11847,6 +11855,8 @@ uint32_t dm_read_reg_func(const struct dc_context *ctx, uint32_t address, return 0; } + amdgpu_dm_exit_ips_for_hw_access(ctx->dc); + value = cgs_read_register(ctx->cgs_device, address); trace_amdgpu_dc_rreg(&ctx->perf_trace->read_count, address, value);

1 year, 2 months

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FAILED: patch "[PATCH] drm/amd/display: prevent register access while in IPS" failed to apply to 6.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.10.y git checkout FETCH_HEAD git cherry-pick -x 02593249fa11ef8d2ca780ef91962f81b04eeea0 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024081249-trading-concrete-fd0b@gregkh' --subject-prefix 'PATCH 6.10.y' HEAD^.. Possible dependencies: 02593249fa11 ("drm/amd/display: prevent register access while in IPS") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 02593249fa11ef8d2ca780ef91962f81b04eeea0 Mon Sep 17 00:00:00 2001 From: Hamza Mahfooz <hamza.mahfooz(a)amd.com> Date: Mon, 3 Jun 2024 10:16:45 -0400 Subject: [PATCH] drm/amd/display: prevent register access while in IPS We can't read/write to DCN registers while in IPS. Since, that can cause the system to hang. So, before proceeding with the access in that scenario, force the system out of IPS. Cc: stable(a)vger.kernel.org # 6.6+ Reviewed-by: Roman Li <roman.li(a)amd.com> Signed-off-by: Hamza Mahfooz <hamza.mahfooz(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 6d468badb669..27acbe3ff57b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -11814,6 +11814,12 @@ void amdgpu_dm_trigger_timing_sync(struct drm_device *dev) mutex_unlock(&adev->dm.dc_lock); } +static inline void amdgpu_dm_exit_ips_for_hw_access(struct dc *dc) +{ + if (dc->ctx->dmub_srv && !dc->ctx->dmub_srv->idle_exit_counter) + dc_exit_ips_for_hw_access(dc); +} + void dm_write_reg_func(const struct dc_context *ctx, uint32_t address, u32 value, const char *func_name) { @@ -11824,6 +11830,8 @@ void dm_write_reg_func(const struct dc_context *ctx, uint32_t address, return; } #endif + + amdgpu_dm_exit_ips_for_hw_access(ctx->dc); cgs_write_register(ctx->cgs_device, address, value); trace_amdgpu_dc_wreg(&ctx->perf_trace->write_count, address, value); } @@ -11847,6 +11855,8 @@ uint32_t dm_read_reg_func(const struct dc_context *ctx, uint32_t address, return 0; } + amdgpu_dm_exit_ips_for_hw_access(ctx->dc); + value = cgs_read_register(ctx->cgs_device, address); trace_amdgpu_dc_rreg(&ctx->perf_trace->read_count, address, value);

1 year, 2 months

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