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Wysocki" , "Rafael J. Wysocki" , Linux PM , Ulf Hansson , Nathan Chancellor , LKML , Stanislaw Gruszka , Lai Jiangshan , Naohiro.Aota@wdc.com, kernel-team@meta.com Subject: Re: [PATCH v1] PM: sleep: Restore asynchronous device resume optimization Message-ID: References: <4a043533-009f-4db9-b107-c8374be28d2b@samsung.com> <2f125955-8c7c-465c-938c-8768f7ca360b@samsung.com> <8c468452-1b00-438a-b634-eeccc35d9a41@samsung.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8c468452-1b00-438a-b634-eeccc35d9a41@samsung.com> Hello, On Thu, Feb 08, 2024 at 08:47:12AM +0100, Marek Szyprowski wrote: > I've tried to get drgn running on the test target, but then I've noticed > that it is not possible to run it on ARM 32bit target, as it requires > PROC_KCORE support, which is 'Visible if: PROC_FS [=y] && MMU [=y] && > !ARM [=y]' for some reasons. Bummer. I instrumented code on my test setup (x86) and couldn't repro usage of the dfl_pwq, unfortuantely. Independent of understanding what's going on with the system_unbound_wq, the correct solution seems like using a dedicated workqueue with raised min_active. Just posted the patchset to do that: http://lkml.kernel.org/r/ZcVtzJvJCRV5OLM-@slm.duckdns.org Thanks. -- tejun