From: Peter Zijlstra <peterz@infradead.org>
To: Usama Arif <usama.arif@linux.dev>
Cc: axboe@kernel.dk, linux-block@vger.kernel.org, bsegall@google.com,
dietmar.eggemann@arm.com, juri.lelli@redhat.com,
kprateek.nayak@amd.com, linux-kernel@vger.kernel.org,
mgorman@suse.de, mingo@redhat.com, rostedt@goodmis.org,
vincent.guittot@linaro.org, vschneid@redhat.com,
shakeel.butt@linux.dev, hannes@cmpxchg.org, riel@surriel.com,
kernel-team@meta.com, stable@vger.kernel.org
Subject: Re: [PATCH v2] block: invalidate cached plug timestamp after task switch
Date: Fri, 12 Jun 2026 11:45:20 +0200 [thread overview]
Message-ID: <20260612094520.GA42921@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20260612094042.3350401-1-usama.arif@linux.dev>
On Fri, Jun 12, 2026 at 02:40:42AM -0700, Usama Arif wrote:
> +static __always_inline void blk_plug_invalidate_ts(void)
> {
> + if (unlikely(current->flags & PF_BLOCK_TS)) {
> + struct blk_plug *plug = current->plug;
>
> + if (plug)
> + plug->cur_ktime = 0;
> + current->flags &= ~PF_BLOCK_TS;
> + }
> }
If you can guarantee PF_BLOCK_TS is only ever set when current->plug,
this can be reduced further.
next prev parent reply other threads:[~2026-06-12 9:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-12 9:40 [PATCH v2] block: invalidate cached plug timestamp after task switch Usama Arif
2026-06-12 9:45 ` Peter Zijlstra [this message]
2026-06-12 10:02 ` Usama Arif
2026-06-12 15:40 ` Peter Zijlstra
2026-06-12 15:47 ` Usama Arif
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