From: Leo Yan <leo.yan@arm.com>
To: James Clark <james.clark@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@arm.com>, Suyash Mahar <smahar@meta.com>,
Yeoreum Yun <yeoreum.yun@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Qi Liu <liuqi115@huawei.com>, Junhao He <hejunhao3@huawei.com>,
coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Jonathan Cameron <jic23@kernel.org>
Subject: Re: [PATCH v4 02/10] coresight: etm-perf: Remove workqueue for freeing AUX data
Date: Thu, 12 Nov 2026 17:13:46 +0000 [thread overview]
Message-ID: <20261112171346.GL9176@e132581.arm.com> (raw)
In-Reply-To: <20261016-james-cs-multiple-per-threads-v4-2-dedf961aca0e@linaro.org>
On Fri, Oct 16, 2026 at 11:46:12AM +0100, James Clark wrote:
> AUX cleanup is deferred to a workqueue which is never flushed on module
> unload. Pending work items can therefore run after coresight-config is
> cleaned up or the module text is unloaded.
>
> Since commit 95ff4ca26c49 ("perf/core: Free AUX pages in unmap path"), Perf
> core stops AUX transactions and frees the PMU AUX data from the unmap
> path in non-atomic context. Release the resources directly from the
> free_aux() callback and remove the workqueue.
>
> Fixes: 0bcbf2e30ff2 ("coresight: etm-perf: new PMU driver for ETM tracers")
> Signed-off-by: James Clark <james.clark@linaro.org>
Reviewed-by: Leo Yan <leo.yan@arm.com>
next prev parent reply other threads:[~2026-11-12 17:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-16 10:46 [PATCH v4 00/10] coresight: Prevent per-thread events from sharing a sink James Clark
2026-10-16 10:46 ` [PATCH v4 01/10] coresight: configfs: Don't assume active until cscfg_mgr is set James Clark
2026-10-28 10:14 ` Suzuki K Poulose
2026-10-28 13:00 ` James Clark
2026-11-12 17:10 ` Leo Yan
2026-10-16 10:46 ` [PATCH v4 02/10] coresight: etm-perf: Remove workqueue for freeing AUX data James Clark
2026-11-12 17:13 ` Leo Yan [this message]
2026-10-16 10:46 ` [PATCH v4 03/10] coresight: etm-perf: Serialize AUX topology access James Clark
2026-10-16 10:46 ` [PATCH v4 04/10] coresight: etm-perf: Reject event if building path fails James Clark
2026-10-16 10:46 ` [PATCH v4 05/10] coresight: etm-perf: Prevent sink sharing at setup time James Clark
2026-10-16 10:46 ` [PATCH v4 06/10] coresight: tmc-etr: Reflect new sharing rules in allocator James Clark
2026-10-16 10:46 ` [PATCH v4 07/10] coresight: tmc-etr: Remove sharing guards from ETR James Clark
2026-10-16 10:46 ` [PATCH v4 08/10] coresight: tmc-etf: Remove sharing guards from ETF James Clark
2026-10-16 10:46 ` [PATCH v4 09/10] coresight: etb10: Remove sharing guards from ETB10 James Clark
2026-10-16 10:46 ` [PATCH v4 10/10] coresight: ultrasoc-smb: Remove sharing guards from SMB James Clark
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