From: Jiri Olsa <jolsa@redhat.com>
To: Robert Richter <rric@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
linux-kernel@vger.kernel.org,
Robert Richter <robert.richter@calxeda.com>
Subject: Re: [PATCH 16/16] perf, persistent: Allow multiple users for an event
Date: Mon, 3 Jun 2013 15:49:25 +0200 [thread overview]
Message-ID: <20130603134925.GA13548@krava.brq.redhat.com> (raw)
In-Reply-To: <1369990056-10310-17-git-send-email-rric@kernel.org>
On Fri, May 31, 2013 at 10:47:36AM +0200, Robert Richter wrote:
> From: Robert Richter <robert.richter@calxeda.com>
SNIP
> out:
> mutex_unlock(&per_cpu(pers_events_lock, cpu));
> }
> @@ -182,18 +195,31 @@ fail:
> int perf_get_persistent_event_fd(unsigned cpu, struct perf_event_attr *attr)
> {
> struct pers_event_desc *desc;
> + struct perf_event *event;
> int event_fd = -ENODEV;
>
> mutex_lock(&per_cpu(pers_events_lock, cpu));
maybe check for valid cpu, since perf_get_persistent_event_fd is
called directly from syscall allowing anything in cpu
(unrelated to this patch, but I couldn't find the original
patch that adds perf_get_persistent_event_fd)
jirka
next prev parent reply other threads:[~2013-06-03 13:50 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-31 8:47 [PATCH 00/16] perf, persistent: Kernel updates for perf tool integration Robert Richter
2013-05-31 8:47 ` [PATCH 01/16] perf, persistent: Fix build error for no-tracepoints configs Robert Richter
2013-05-31 9:05 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 02/16] perf, persistent: Fix attr size Robert Richter
2013-05-31 9:05 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 03/16] perf, persistent: Setting default buffer size to 512k as in perf tools Robert Richter
2013-05-31 9:07 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 04/16] perf, persistent: Print error code on failure when adding events Robert Richter
2013-05-31 9:10 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 05/16] perf, persistent: Return resonable error code Robert Richter
2013-05-31 9:11 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 06/16] perf, persistent: Return -EACCES if mapped buffers must be readonly Robert Richter
2013-05-31 9:12 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 07/16] perf, persistent: Rework struct pers_event_desc Robert Richter
2013-05-31 8:47 ` [PATCH 08/16] perf, persistent: Remove rb_put() Robert Richter
2013-05-31 8:47 ` [PATCH 09/16] perf, persistent: Introduce get_persistent_event() Robert Richter
2013-05-31 8:47 ` [PATCH 10/16] perf, persistent: Reworking perf_get_persistent_event_fd() Robert Richter
2013-05-31 8:47 ` [PATCH 11/16] perf, persistent: Protect event lists with mutex Robert Richter
2013-05-31 8:47 ` [PATCH 12/16] perf, persistent: Avoid adding identical events Robert Richter
2013-05-31 8:47 ` [PATCH 13/16] perf, persistent: Implementing a persistent pmu Robert Richter
2013-05-31 8:47 ` [PATCH 14/16] perf, persistent: Name each persistent event Robert Richter
2013-05-31 8:47 ` [PATCH 15/16] perf, persistent: Exposing persistent events using sysfs Robert Richter
2013-05-31 8:47 ` [PATCH 16/16] perf, persistent: Allow multiple users for an event Robert Richter
2013-06-03 13:49 ` Jiri Olsa [this message]
2013-06-04 8:20 ` Borislav Petkov
2013-06-04 9:19 ` Jiri Olsa
2013-06-04 9:35 ` Borislav Petkov
2013-06-07 13:47 ` Robert Richter
2013-05-31 9:15 ` [PATCH 00/16] perf, persistent: Kernel updates for perf tool integration Borislav Petkov
2013-05-31 9:32 ` Robert Richter
2013-05-31 12:21 ` Borislav Petkov
2013-06-01 16:15 ` Robert Richter
2013-06-02 7:29 ` Borislav Petkov
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