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From: Muchun Song <muchun.song@linux.dev>
To: Chuyi Zhou <zhouchuyi@bytedance.com>
Cc: tglx@linutronix.de, mingo@redhat.com, luto@kernel.org,
	peterz@infradead.org, paulmck@kernel.org, bp@alien8.de,
	dave.hansen@linux.intel.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 01/11] smp: Disable preemption explicitly in __csd_lock_wait
Date: Thu, 5 Feb 2026 14:05:36 +0800	[thread overview]
Message-ID: <20B0E424-AF2A-4043-96A1-D0919E986A90@linux.dev> (raw)
In-Reply-To: <20260203112401.3889029-2-zhouchuyi@bytedance.com>



> On Feb 3, 2026, at 19:23, Chuyi Zhou <zhouchuyi@bytedance.com> wrote:
> 
> The latter patches will enable preemption before csd_lock_wait(), which
> could break csdlock_debug. Because the slice of other tasks on the CPU may
> be accounted between ktime_get_mono_fast_ns() calls. Disable preemption
> explicitly in __csd_lock_wait(). This is a preparation for the next
> patches.
> 
> Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com>

Acked-by: Muchun Song <muchun.song@linux.dev>

Thanks.


  reply	other threads:[~2026-02-05  6:06 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-03 11:23 [PATCH 00/11] Allow preemption during IPI completion waiting to improve real-time performance Chuyi Zhou
2026-02-03 11:23 ` [PATCH 01/11] smp: Disable preemption explicitly in __csd_lock_wait Chuyi Zhou
2026-02-05  6:05   ` Muchun Song [this message]
2026-02-03 11:23 ` [PATCH 02/11] smp: Enable preemption early in smp_call_function_single Chuyi Zhou
2026-02-05  3:55   ` Muchun Song
2026-02-05  9:34   ` Peter Zijlstra
2026-02-03 11:23 ` [PATCH 03/11] smp: Remove get_cpu from smp_call_function_any Chuyi Zhou
2026-02-05  6:03   ` Muchun Song
2026-02-05  9:42   ` Peter Zijlstra
2026-02-06  8:54     ` Chuyi Zhou
2026-02-03 11:23 ` [PATCH 04/11] smp: Use on-stack cpumask in smp_call_function_many_cond Chuyi Zhou
2026-02-05  9:44   ` Peter Zijlstra
2026-02-06  9:07     ` Chuyi Zhou
2026-02-05  9:51   ` Peter Zijlstra
2026-02-03 11:23 ` [PATCH 05/11] smp: Enable preemption early " Chuyi Zhou
2026-02-05  9:52   ` Peter Zijlstra
2026-02-05 10:57     ` Peter Zijlstra
2026-02-05 14:29       ` Chuyi Zhou
2026-02-05 14:59         ` Peter Zijlstra
2026-02-06  8:43           ` Chuyi Zhou
2026-02-06  9:47             ` Peter Zijlstra
2026-02-06 11:45               ` Chuyi Zhou
2026-02-09  7:56     ` Chuyi Zhou
2026-02-03 11:23 ` [PATCH 06/11] smp: Remove preempt_disable from smp_call_function Chuyi Zhou
2026-02-03 11:23 ` [PATCH 07/11] smp: Remove preempt_disable from on_each_cpu_cond_mask Chuyi Zhou
2026-02-03 11:23 ` [PATCH 08/11] scftorture: Remove preempt_disable in scftorture_invoke_one Chuyi Zhou
2026-02-03 11:23 ` [PATCH 09/11] x86/mm: Move flush_tlb_info back to the stack Chuyi Zhou
2026-02-03 11:24 ` [PATCH 10/11] x86/mm: Enable preemption during native_flush_tlb_multi Chuyi Zhou
2026-02-03 11:24 ` [PATCH 11/11] x86/mm: Enable preemption during flush_tlb_kernel_range Chuyi Zhou

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