From: Peter Zijlstra <peterz@infradead.org>
To: Like Xu <like.xu@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RESEND 2/2] perf/x86/lbr: Move cpuc->lbr_xsave allocation out of sleeping region
Date: Wed, 21 Apr 2021 10:38:34 +0200 [thread overview]
Message-ID: <YH/kikWFlfD260qy@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20210421021825.37872-2-like.xu@linux.intel.com>
On Wed, Apr 21, 2021 at 10:18:25AM +0800, Like Xu wrote:
> -int x86_reserve_hardware(void)
> +int x86_reserve_hardware(struct perf_event *event)
> {
> int err = 0;
>
> @@ -398,8 +398,10 @@ int x86_reserve_hardware(void)
> if (atomic_read(&pmc_refcount) == 0) {
> if (!reserve_pmc_hardware())
> err = -EBUSY;
> - else
> + else {
> reserve_ds_buffers();
> + reserve_lbr_buffers(event);
> + }
> }
> if (!err)
> atomic_inc(&pmc_refcount);
> @@ -650,7 +652,7 @@ static int __x86_pmu_event_init(struct perf_event *event)
> if (!x86_pmu_initialized())
> return -ENODEV;
>
> - err = x86_reserve_hardware();
> + err = x86_reserve_hardware(event);
> if (err)
> return err;
>
This is still complete garbage..
next prev parent reply other threads:[~2021-04-21 8:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 2:18 [PATCH RESEND 1/2] perf/x86: Skip checking MSR for MSR 0x0 Like Xu
2021-04-21 2:18 ` [PATCH RESEND 2/2] perf/x86/lbr: Move cpuc->lbr_xsave allocation out of sleeping region Like Xu
2021-04-21 8:38 ` Peter Zijlstra [this message]
2021-04-21 8:48 ` Like Xu
2021-04-21 9:21 ` Peter Zijlstra
2021-04-21 15:30 ` [PATCH RESEND 1/2] perf/x86: Skip checking MSR for MSR 0x0 Sean Christopherson
2021-04-22 1:18 ` Like Xu
2021-04-22 1:38 ` Sean Christopherson
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