linux-kernel - Re: [PATCH] perf/x86: Add cond_resched() when allocate/release DS buffers

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Message-ID: <20251028141518.GA4067720@noisy.programming.kicks-ass.net>
Date: Tue, 28 Oct 2025 15:15:18 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>, Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH] perf/x86: Add cond_resched() when allocate/release DS
 buffers

On Mon, Oct 27, 2025 at 02:27:24PM -0700, Namhyung Kim wrote:
> On large systems, it's possible to trigger sched latency warning during
> the DS buffer allocation or release.  Add cond_resched() to avoid it.

We're >.< close to deleting cond_resched(), it makes absolutely no sense
adding more.