Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | [RFT][PATCH v2 0/4] ACPI: ACPICA / OSL: Avoid unmapping ACPI memory inside of the AML interpreter | Date | Mon, 22 Jun 2020 15:50:42 +0200 |
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Hi All,
This series is to address the problem with RCU synchronization occurring, possibly relatively often, inside of acpi_ex_system_memory_space_handler(), when the namespace and interpreter mutexes are held.
Like I said before, I had decided to change the approach used in the previous iteration of this series and to allow the unmap operations carried out by acpi_ex_system_memory_space_handler() to be deferred in the first place, which is done in patches [1-2/4].
However, it turns out that the "fast-path" mapping is still useful on top of the above to reduce the number of ioremap-iounmap cycles for the same address range and so it is introduced by patches [3-4/4].
For details, please refer to the patch changelogs.
The series is available from the git branch at
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \ acpica-osl
for easier testing.
Cheers, Rafael
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