Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Mon, 12 Feb 2024 15:57:21 +0100 | Subject | Re: [PATCH v1] PM: sleep: Restore asynchronous device resume optimization |
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Hi,
On Fri, Feb 9, 2024 at 1:20 AM Tejun Heo <tj@kernel.org> wrote: > > 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.
On x86 there are fewer device links representing dependencies between devices, because it doesn't use fw_devlink which is used on ARM platforms (and other DT-based), so on x86 it is less likely to reproduce this.
> 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
LGTM, thanks!
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