From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C94A3FE668; Fri, 26 Jun 2026 16:50:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782492649; cv=none; b=QZ7yGuU7CGN3bSdethQetXz713dPd18aZDMDyQpwKSVky5hoy1/u53G1hZVEy0rzl2j4bVqlQQuqmlyY2mKb4CkTUbymYDM+1a5Zc/lknLcqfeaGrn7EjIjYY1gz83J8XfFWb0LGtKqg2JUNPwKGfPEP5cYWOtVfw858C7QM68c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782492649; c=relaxed/simple; bh=IEcd81ljtMrBNEBHEtxTNTq0HlbccbabNlUUo0MHkpw=; h=Date:To:From:Subject:Message-Id; b=r+5cGm2XhfBpPAhnZNJyN4vrv6hxE1ztwtX+tuCOK+VECbeNmZZigCimq+gBgUiWCrTd/2aaI3dS5f8v85m4sTLPAnttdAQxyxQcqVoCJCqQrKCONuqmVTXXURLxRvyX3KefZxVBcWPntm1VcFrMJleiyg5M6GdBlp2eLtO9hF4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=kvyIqDii; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="kvyIqDii" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D45F01F00A3D; Fri, 26 Jun 2026 16:50:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1782492645; bh=1BDr4k4b7PNNTJBp/fS6Z6fkAm4IwyqPuu3Zg5UZpcE=; h=Date:To:From:Subject; b=kvyIqDii6PtkNLdJ9Is4wWdZjRD+9q+4X1yxhaevbbhVFf0ZvrkLI1Kgx9zb7vSfn H6y98skCw2CRLp6BLmXXu9BRYZzCk3AxtOdYFU2tLESkNWzU2uh0Y8+t4bAFVM/SNm k1+EhSELqEvfLTbj1+zdIueEgAod60NBnGlsma/o= Date: Fri, 26 Jun 2026 09:50:45 -0700 To: mm-commits@vger.kernel.org,stable@vger.kernel.org,pmladek@suse.com,npiggin@gmail.com,mpe@ellerman.id.au,maddy@linux.ibm.com,dianders@chromium.org,include@grrlz.net,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] powerpc-watchdog-use-sys_info_with_filter-to-avoid-duplicate-backtraces.patch removed from -mm tree Message-Id: <20260626165045.D45F01F00A3D@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: powerpc/watchdog: use sys_info_with_filter() to avoid duplicate backtraces has been removed from the -mm tree. Its filename was powerpc-watchdog-use-sys_info_with_filter-to-avoid-duplicate-backtraces.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Bradley Morgan Subject: powerpc/watchdog: use sys_info_with_filter() to avoid duplicate backtraces Date: Thu, 25 Jun 2026 15:25:57 +0000 The powerpc watchdog prints all CPU backtraces itself. When the watchdog mask contains only SYS_INFO_ALL_BT, stripping that bit leaves zero and sys_info(0) falls back to kernel_sys_info. Use sys_info_with_filter() so an explicit all_bt mask does not request the global default. Link: https://lore.kernel.org/20260625152558.7450-4-include@grrlz.net Fixes: a9af76a78760 ("watchdog: add sys_info sysctls to dump sys info on system lockup") Signed-off-by: Bradley Morgan Cc: Doug Anderson Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Petr Mladek Cc: Signed-off-by: Andrew Morton --- arch/powerpc/kernel/watchdog.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) --- a/arch/powerpc/kernel/watchdog.c~powerpc-watchdog-use-sys_info_with_filter-to-avoid-duplicate-backtraces +++ a/arch/powerpc/kernel/watchdog.c @@ -201,6 +201,7 @@ static bool set_cpu_stuck(int cpu) static void watchdog_smp_panic(int cpu) { static cpumask_t wd_smp_cpus_ipi; // protected by reporting + unsigned long si_mask; unsigned long flags; u64 tb, last_reset; int c; @@ -236,8 +237,9 @@ static void watchdog_smp_panic(int cpu) pr_emerg("CPU %d TB:%lld, last SMP heartbeat TB:%lld (%lldms ago)\n", cpu, tb, last_reset, tb_to_ns(tb - last_reset) / 1000000); + si_mask = READ_ONCE(hardlockup_si_mask); if (sysctl_hardlockup_all_cpu_backtrace || - (hardlockup_si_mask & SYS_INFO_ALL_BT)) { + (si_mask & SYS_INFO_ALL_BT)) { trigger_allbutcpu_cpu_backtrace(cpu); cpumask_clear(&wd_smp_cpus_ipi); } else { @@ -251,7 +253,7 @@ static void watchdog_smp_panic(int cpu) } } - sys_info(hardlockup_si_mask & ~SYS_INFO_ALL_BT); + sys_info_with_filter(si_mask, SYS_INFO_ALL_BT); if (hardlockup_panic) nmi_panic(NULL, "Hard LOCKUP"); @@ -371,6 +373,7 @@ static void watchdog_timer_interrupt(int DEFINE_INTERRUPT_HANDLER_NMI(soft_nmi_interrupt) { + unsigned long si_mask; unsigned long flags; int cpu = raw_smp_processor_id(); u64 tb; @@ -418,11 +421,12 @@ DEFINE_INTERRUPT_HANDLER_NMI(soft_nmi_in xchg(&__wd_nmi_output, 1); // see wd_lockup_ipi + si_mask = READ_ONCE(hardlockup_si_mask); if (sysctl_hardlockup_all_cpu_backtrace || - (hardlockup_si_mask & SYS_INFO_ALL_BT)) + (si_mask & SYS_INFO_ALL_BT)) trigger_allbutcpu_cpu_backtrace(cpu); - sys_info(hardlockup_si_mask & ~SYS_INFO_ALL_BT); + sys_info_with_filter(si_mask, SYS_INFO_ALL_BT); if (hardlockup_panic) nmi_panic(regs, "Hard LOCKUP"); _ Patches currently in -mm which might be from include@grrlz.net are panic-use-sys_info_with_filter-to-avoid-duplicate-backtraces.patch lib-string-fix-memchr_inv-for-large-ranges.patch