From: Thomas Gleixner <tglx@linutronix.de>
To: Andy Lutomirski <luto@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>
Cc: Valentin Schneider <vschneid@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, rcu@vger.kernel.org,
the arch/x86 maintainers <x86@kernel.org>,
linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
Frederic Weisbecker <frederic@kernel.org>,
Jason Baron <jbaron@akamai.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ard Biesheuvel <ardb@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
"David S. Miller" <davem@davemloft.net>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Joel Fernandes <joelagnelf@nvidia.com>,
Josh Triplett <josh@joshtriplett.org>,
Boqun Feng <boqun.feng@gmail.com>,
Uladzislau Rezki <urezki@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Han Shen <shenhan@google.com>, Rik van Riel <riel@surriel.com>,
Jann Horn <jannh@google.com>,
Dan Carpenter <dan.carpenter@linaro.org>,
Oleg Nesterov <oleg@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Clark Williams <williams@redhat.com>,
Yair Podemsky <ypodemsk@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Daniel Wagner <dwagner@suse.de>, Petr Tesarik <ptesarik@suse.com>,
Shrikanth Hegde <sshegde@linux.ibm.com>
Subject: Re: [PATCH v7 00/31] context_tracking,x86: Defer some IPIs until a user->kernel transition
Date: Fri, 14 Nov 2025 21:06:34 +0100 [thread overview]
Message-ID: <87zf8o9y5x.ffs@tglx> (raw)
In-Reply-To: <1a911310-4ca5-45a4-b9bf-5f37c6ab238e@app.fastmail.com>
On Fri, Nov 14 2025 at 10:45, Andy Lutomirski wrote:
> But I did that test on a machine that would absolutely benefit from
> the IPI suppression that the OP is talking about here, and I think it
> would be really quite nice if a default distro kernel with a more or
> less default distribution could be easily convinced to run a user
> thread without interrupting it. It's a little bit had that NO_HZ_FULL
> is still an exotic non-default thing, IMO.
Feel free to help with getting it over the finish line. Feeling sad/bad
(or whatever you wanted to say with 'had') does not change anything as
you should know :)
Thanks,
tglx
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de>
To: Andy Lutomirski <luto@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>
Cc: Valentin Schneider <vschneid@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, rcu@vger.kernel.org,
the arch/x86 maintainers <x86@kernel.org>,
linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
Frederic Weisbecker <frederic@kernel.org>,
Jason Baron <jbaron@akamai.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ard Biesheuvel <ardb@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
"David S. Miller" <davem@davemloft.net>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Joel Fernandes <joelagnelf@nvidia.com>,
Josh Triplett <josh@joshtriplett.org>,
Boqun Feng <boqun.feng@gmail.com>,
Uladzislau Rezki <urezki@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Han Shen <shenhan@google.com>, Rik van Riel <riel@surriel.com>,
Jann Horn <jannh@google.com>,
Dan Carpenter <dan.carpenter@linaro.org>,
Oleg Nesterov <oleg@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Clark Williams <williams@redhat.com>,
Yair Podemsky <ypodemsk@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Daniel Wagner <dwagner@suse.de>, Petr Tesarik <ptesarik@suse.com>,
Shrikanth Hegde <sshegde@linux.ibm.com>
Subject: Re: [PATCH v7 00/31] context_tracking,x86: Defer some IPIs until a user->kernel transition
Date: Fri, 14 Nov 2025 21:06:34 +0100 [thread overview]
Message-ID: <87zf8o9y5x.ffs@tglx> (raw)
In-Reply-To: <1a911310-4ca5-45a4-b9bf-5f37c6ab238e@app.fastmail.com>
On Fri, Nov 14 2025 at 10:45, Andy Lutomirski wrote:
> But I did that test on a machine that would absolutely benefit from
> the IPI suppression that the OP is talking about here, and I think it
> would be really quite nice if a default distro kernel with a more or
> less default distribution could be easily convinced to run a user
> thread without interrupting it. It's a little bit had that NO_HZ_FULL
> is still an exotic non-default thing, IMO.
Feel free to help with getting it over the finish line. Feeling sad/bad
(or whatever you wanted to say with 'had') does not change anything as
you should know :)
Thanks,
tglx
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2025-11-14 20:06 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-14 15:01 [PATCH v7 00/31] context_tracking,x86: Defer some IPIs until a user->kernel transition Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 01/31] objtool: Make validate_call() recognize indirect calls to pv_ops[] Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 02/31] objtool: Flesh out warning related to pv_ops[] calls Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 03/31] rcu: Add a small-width RCU watching counter debug option Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 04/31] rcutorture: Make TREE04 use CONFIG_RCU_DYNTICKS_TORTURE Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 05/31] jump_label: Add annotations for validating noinstr usage Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 06/31] static_call: Add read-only-after-init static calls Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 07/31] x86/paravirt: Mark pv_sched_clock static call as __ro_after_init Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 08/31] x86/idle: Mark x86_idle " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 09/31] x86/paravirt: Mark pv_steal_clock " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 10/31] riscv/paravirt: " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 11/31] loongarch/paravirt: " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 12/31] arm64/paravirt: " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 13/31] arm/paravirt: " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 14/31] perf/x86/amd: Mark perf_lopwr_cb " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 15/31] sched/clock: Mark sched_clock_running key " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 16/31] KVM: VMX: Mark __kvm_is_using_evmcs static " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 17/31] x86/bugs: Mark cpu_buf_vm_clear key as allowed in .noinstr Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:01 ` [PATCH v7 18/31] x86/speculation/mds: Mark cpu_buf_idle_clear " Valentin Schneider
2025-11-14 15:01 ` Valentin Schneider
2025-11-14 15:10 ` [PATCH v7 19/31] sched/clock, x86: Mark __sched_clock_stable " Valentin Schneider
2025-11-14 15:10 ` Valentin Schneider
2025-11-14 15:10 ` [PATCH v7 20/31] KVM: VMX: Mark vmx_l1d_should flush and vmx_l1d_flush_cond keys " Valentin Schneider
2025-11-14 15:10 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 21/31] stackleack: Mark stack_erasing_bypass key " Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 22/31] objtool: Add noinstr validation for static branches/calls Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 23/31] module: Add MOD_NOINSTR_TEXT mem_type Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 24/31] context-tracking: Introduce work deferral infrastructure Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 25/31] context_tracking,x86: Defer kernel text patching IPIs Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 26/31] x86/jump_label: Add ASM support for static_branch_likely() Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [PATCH v7 27/31] x86/mm: Make INVPCID type macros available to assembly Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [RFC PATCH v7 28/31] x86/mm/pti: Introduce a kernel/user CR3 software signal Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 15:14 ` [RFC PATCH v7 29/31] x86/mm/pti: Implement a TLB flush immediately after a switch to kernel CR3 Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-19 14:31 ` Andy Lutomirski
2025-11-19 14:31 ` Andy Lutomirski
2025-11-19 15:44 ` Valentin Schneider
2025-11-19 15:44 ` Valentin Schneider
2025-11-19 17:31 ` Andy Lutomirski
2025-11-19 17:31 ` Andy Lutomirski
2025-11-21 10:12 ` Valentin Schneider
2025-11-21 10:12 ` Valentin Schneider
2025-11-14 15:14 ` [RFC PATCH v7 30/31] x86/mm, mm/vmalloc: Defer kernel TLB flush IPIs under CONFIG_COALESCE_TLBI=y Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-19 18:31 ` Dave Hansen
2025-11-19 18:31 ` Dave Hansen
2025-11-19 18:33 ` Andy Lutomirski
2025-11-19 18:33 ` Andy Lutomirski
2025-11-21 17:37 ` Valentin Schneider
2025-11-21 17:37 ` Valentin Schneider
2025-11-21 17:50 ` Dave Hansen
2025-11-21 17:50 ` Dave Hansen
2025-11-25 14:13 ` Valentin Schneider
2025-11-25 14:13 ` Valentin Schneider
2025-11-14 15:14 ` [RFC PATCH v7 31/31] x86/entry: Add an option to coalesce TLB flushes Valentin Schneider
2025-11-14 15:14 ` Valentin Schneider
2025-11-14 16:20 ` [PATCH v7 00/31] context_tracking,x86: Defer some IPIs until a user->kernel transition Andy Lutomirski
2025-11-14 16:20 ` Andy Lutomirski
2025-11-14 17:22 ` Andy Lutomirski
2025-11-14 17:22 ` Andy Lutomirski
2025-11-14 18:14 ` Paul E. McKenney
2025-11-14 18:14 ` Paul E. McKenney
2025-11-14 18:45 ` Andy Lutomirski
2025-11-14 18:45 ` Andy Lutomirski
2025-11-14 20:03 ` Paul E. McKenney
2025-11-14 20:03 ` Paul E. McKenney
2025-11-15 0:29 ` Andy Lutomirski
2025-11-15 0:29 ` Andy Lutomirski
2025-11-15 2:30 ` Paul E. McKenney
2025-11-15 2:30 ` Paul E. McKenney
2025-11-14 20:06 ` Thomas Gleixner [this message]
2025-11-14 20:06 ` Thomas Gleixner
2025-12-19 8:10 ` patchwork-bot+linux-riscv
2025-12-19 8:10 ` patchwork-bot+linux-riscv
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