From: sashiko-bot@kernel.org
To: "Zhao Gongyi" <zhaogongyi@bytedance.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH] perf/x86: Reject pair-counter groups with no GP budget
Date: Mon, 09 Nov 2026 11:20:34 +0000 [thread overview]
Message-ID: <sashiko-outbox-204864@kernel.org> (raw)
In-Reply-To: <20261109110356.27709-1-zhaogongyi@bytedance.com>
> AMD large-increment events reserve an extra GP counter. A syzkaller
> reproducer opens a perf event group until the adjusted GP budget is
> exhausted. x86_schedule_events() then WARNs on the unschedulable group.
>
> Treat an exhausted budget as a scheduling failure and return -EINVAL
> through the existing cleanup path.
>
> Fixes: 5738891229a2 ("perf/x86/amd: Add support for Large Increment per Cycle Events")
> Cc: stable@vger.kernel.org
> Signed-off-by: Zhao Gongyi <zhaogongyi@bytedance.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261109110356.27709-1-zhaogongyi@bytedance.com?part=1
next prev parent reply other threads:[~2026-11-09 11:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 11:03 [PATCH] perf/x86: Reject pair-counter groups with no GP budget Zhao Gongyi
2026-11-09 11:20 ` sashiko-bot [this message]
2026-11-12 2:40 ` Hang Zhengyang
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