From: Peter Zijlstra <peterz@infradead.org>
To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, acme@redhat.com,
kirill.shutemov@linux.intel.com, Borislav Petkov <bp@alien8.de>,
rric@kernel.org
Subject: Re: [RFC PATCH 14/17] perf: Add ioctl(REATTACH) for detached events
Date: Tue, 3 Oct 2017 16:50:27 +0200 [thread overview]
Message-ID: <20171003145027.bkkn2p7dcff4xp7o@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20170905133026.13689-15-alexander.shishkin@linux.intel.com>
On Tue, Sep 05, 2017 at 04:30:23PM +0300, Alexander Shishkin wrote:
> This adds an ioctl command to demote a detached event to a 'normal' one
> that gets destroyed when its file descriptor is closed. It can still be
> used to mmap the buffers, but not very useful otherwise.
why not simply use the fd obtained from open() on our special
filesystem?
If you open and then unlink, you loose the 'detached' state and the
filedesc is the only life-line.
next prev parent reply other threads:[~2017-10-03 14:50 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-05 13:30 [RFC PATCH 00/17] perf: Detached events Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 01/17] perf: Allow mmapping only user page Alexander Shishkin
2017-09-06 16:28 ` Borislav Petkov
2017-09-13 11:35 ` Alexander Shishkin
2017-09-13 12:58 ` Borislav Petkov
2017-09-05 13:30 ` [RFC PATCH 02/17] perf: Factor out mlock accounting Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 03/17] tracefs: De-globalize instances' callbacks Alexander Shishkin
2018-01-24 18:54 ` Steven Rostedt
2017-09-05 13:30 ` [RFC PATCH 04/17] tracefs: Add ->unlink callback to tracefs_dir_ops Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 05/17] perf: Introduce detached events Alexander Shishkin
2017-10-03 14:34 ` Peter Zijlstra
2017-10-06 11:23 ` Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 06/17] perf: Add buffers to the " Alexander Shishkin
2017-10-03 14:36 ` Peter Zijlstra
2017-09-05 13:30 ` [RFC PATCH 07/17] perf: Add pmu_info to user page Alexander Shishkin
2017-10-03 14:40 ` Peter Zijlstra
2017-09-05 13:30 ` [RFC PATCH 08/17] perf: Allow inheritance for detached events Alexander Shishkin
2017-10-03 14:42 ` Peter Zijlstra
2017-10-06 11:40 ` Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 09/17] perf: Use shmemfs pages for userspace-only per-thread " Alexander Shishkin
2017-10-03 14:43 ` Peter Zijlstra
2017-10-06 11:52 ` Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 10/17] perf: Implement pinning and scheduling for SHMEM events Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 11/17] perf: Implement mlock accounting for shmem ring buffers Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 12/17] perf: Track pinned events per user Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 13/17] perf: Re-inject shmem buffers after exec Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 14/17] perf: Add ioctl(REATTACH) for detached events Alexander Shishkin
2017-10-03 14:50 ` Peter Zijlstra [this message]
2017-09-05 13:30 ` [RFC PATCH 15/17] perf: Allow controlled non-root access to " Alexander Shishkin
2017-10-03 14:53 ` Peter Zijlstra
2017-09-05 13:30 ` [RFC PATCH 16/17] perf/x86/intel/pt: Add PMU info Alexander Shishkin
2017-09-05 13:30 ` [RFC PATCH 17/17] perf/x86/intel/bts: " Alexander Shishkin
2017-09-06 16:24 ` [RFC PATCH 00/17] perf: Detached events Borislav Petkov
2017-09-13 11:54 ` Alexander Shishkin
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