linux-kernel - [RFC PATCH 0/1] perf/core: Wake up parent event if inherited event has no ring buffer

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Message-Id: <20211206113840.130802-1-james.clark@arm.com>
Date:   Mon,  6 Dec 2021 11:38:39 +0000
From:   James Clark <james.clark@....com>
To:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org
Cc:     linux-perf-users@...r.kernel.org, leo.yan@...aro.com,
        Suzuki.Poulose@....com, James Clark <james.clark@....com>,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/1] perf/core: Wake up parent event if inherited event has no ring buffer

This is one possible fix to the issue described in the commit message.

What I'm not sure about is whether these other two possibilities should
be done instead, which is what I'm looking for feedback on:

 * Assign the ring buffer of the parent event to the child in inherit_event()

 * Move the poll list from the RB to the event, although it was moved into
   the RB for a specific reason in 10c6db1

James Clark (1):
  perf/core: Wake up parent event if inherited event has no ring buffer

 kernel/events/core.c | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.28.0