From: Dan Williams <dan.j.williams@intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: "Kaneda, Erik" <erik.kaneda@intel.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Wysocki, Rafael J" <rafael.j.wysocki@intel.com>,
Len Brown <lenb@kernel.org>, Borislav Petkov <bp@alien8.de>,
James Morse <james.morse@arm.com>,
Myron Stowe <myron.stowe@redhat.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
"Moore, Robert" <robert.moore@intel.com>
Subject: Re: [RFT][PATCH 2/3] ACPICA: Remove unused memory mappings on interpreter exit
Date: Mon, 15 Jun 2020 12:06:11 -0700 [thread overview]
Message-ID: <CAPcyv4iA+21rrwfZ9SdV903TiTo9sA7KfrKVQfLOO-612uanpQ@mail.gmail.com> (raw)
In-Reply-To: <34641620.ChEHEh4gq6@kreacher>
On Sat, Jun 13, 2020 at 12:29 PM Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
[,,]
> > While I agree that this is still somewhat suboptimal, improving this
> > would require more changes in the OSL code.
>
> After writing the above I started to think about the extra changes needed
> to improve that and I realized that it would take making the OS layer
> support deferred memory unmapping, such that the unused mappings would be
> queued up for later removal and then released in one go at a suitable time.
>
> However, that would be sufficient to address the issue addressed by this
> series, because the deferred unmapping could be used in
> acpi_ev_system_memory_region_setup() right away and that would be a much
> simpler change than the one made in patch [1/3].
>
> So I went ahead and implemented this and the result is there in the
> acpica-osl branch in my tree, but it hasn't been built yet, so caveat
> emptor. Anyway, please feel free to have a look at it still.
I'll have a look. However, I was just about to build a test kernel for
the original reporter of this problem with this patch set. Do you want
test feedback on that branch, or this set as is?
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WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: "Kaneda, Erik" <erik.kaneda@intel.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Wysocki, Rafael J" <rafael.j.wysocki@intel.com>,
Len Brown <lenb@kernel.org>, Borislav Petkov <bp@alien8.de>,
"Weiny, Ira" <ira.weiny@intel.com>,
James Morse <james.morse@arm.com>,
Myron Stowe <myron.stowe@redhat.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
"Moore, Robert" <robert.moore@intel.com>
Subject: Re: [RFT][PATCH 2/3] ACPICA: Remove unused memory mappings on interpreter exit
Date: Mon, 15 Jun 2020 12:06:11 -0700 [thread overview]
Message-ID: <CAPcyv4iA+21rrwfZ9SdV903TiTo9sA7KfrKVQfLOO-612uanpQ@mail.gmail.com> (raw)
In-Reply-To: <34641620.ChEHEh4gq6@kreacher>
On Sat, Jun 13, 2020 at 12:29 PM Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
[,,]
> > While I agree that this is still somewhat suboptimal, improving this
> > would require more changes in the OSL code.
>
> After writing the above I started to think about the extra changes needed
> to improve that and I realized that it would take making the OS layer
> support deferred memory unmapping, such that the unused mappings would be
> queued up for later removal and then released in one go at a suitable time.
>
> However, that would be sufficient to address the issue addressed by this
> series, because the deferred unmapping could be used in
> acpi_ev_system_memory_region_setup() right away and that would be a much
> simpler change than the one made in patch [1/3].
>
> So I went ahead and implemented this and the result is there in the
> acpica-osl branch in my tree, but it hasn't been built yet, so caveat
> emptor. Anyway, please feel free to have a look at it still.
I'll have a look. However, I was just about to build a test kernel for
the original reporter of this problem with this patch set. Do you want
test feedback on that branch, or this set as is?
next prev parent reply other threads:[~2020-06-15 19:06 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 23:39 [PATCH v2] ACPI: Drop rcu usage for MMIO mappings Dan Williams
2020-05-07 23:39 ` Dan Williams
2020-05-09 12:30 ` Sasha Levin
2020-05-13 8:52 ` [ACPI] 5a91d41f89: BUG:sleeping_function_called_from_invalid_context_at_kernel/locking/mutex.c kernel test robot
2020-05-13 8:52 ` kernel test robot
2020-05-13 8:52 ` kernel test robot
2020-06-05 13:32 ` [PATCH v2] ACPI: Drop rcu usage for MMIO mappings Rafael J. Wysocki
2020-06-05 13:32 ` Rafael J. Wysocki
2020-06-05 16:18 ` Dan Williams
2020-06-05 16:18 ` Dan Williams
2020-06-05 16:21 ` Rafael J. Wysocki
2020-06-05 16:21 ` Rafael J. Wysocki
2020-06-05 16:39 ` Dan Williams
2020-06-05 16:39 ` Dan Williams
2020-06-05 17:02 ` Rafael J. Wysocki
2020-06-05 17:02 ` Rafael J. Wysocki
2020-06-05 14:06 ` [RFT][PATCH] ACPI: OSL: Use rwlock instead of RCU for memory management Rafael J. Wysocki
2020-06-05 14:06 ` Rafael J. Wysocki
2020-06-05 17:08 ` Dan Williams
2020-06-05 17:08 ` Dan Williams
2020-06-06 6:56 ` Rafael J. Wysocki
2020-06-06 6:56 ` Rafael J. Wysocki
2020-06-08 15:33 ` Rafael J. Wysocki
2020-06-08 15:33 ` Rafael J. Wysocki
2020-06-08 16:29 ` Rafael J. Wysocki
2020-06-08 16:29 ` Rafael J. Wysocki
2020-06-05 19:40 ` Andy Shevchenko
2020-06-05 19:40 ` Andy Shevchenko
2020-06-06 6:48 ` Rafael J. Wysocki
2020-06-06 6:48 ` Rafael J. Wysocki
2020-06-10 12:17 ` [RFT][PATCH 0/3] ACPI: ACPICA / OSL: Avoid unmapping ACPI memory inside of the AML interpreter Rafael J. Wysocki
2020-06-10 12:17 ` Rafael J. Wysocki
2020-06-10 12:20 ` [RFT][PATCH 1/3] ACPICA: Defer unmapping of memory used in memory opregions Rafael J. Wysocki
2020-06-10 12:20 ` Rafael J. Wysocki
2020-06-10 12:21 ` [RFT][PATCH 2/3] ACPICA: Remove unused memory mappings on interpreter exit Rafael J. Wysocki
2020-06-10 12:21 ` Rafael J. Wysocki
2020-06-12 0:12 ` Kaneda, Erik
2020-06-12 0:12 ` Kaneda, Erik
2020-06-12 12:05 ` Rafael J. Wysocki
2020-06-12 12:05 ` Rafael J. Wysocki
2020-06-13 19:28 ` Rafael J. Wysocki
2020-06-13 19:28 ` Rafael J. Wysocki
2020-06-15 19:06 ` Dan Williams [this message]
2020-06-15 19:06 ` Dan Williams
2020-06-10 12:22 ` [RFT][PATCH 3/3] ACPI: OSL: Define ACPI_OS_MAP_MEMORY_FAST_PATH() Rafael J. Wysocki
2020-06-10 12:22 ` Rafael J. Wysocki
2020-06-13 19:19 ` [RFT][PATCH 0/3] ACPI: ACPICA / OSL: Avoid unmapping ACPI memory inside of the AML interpreter Rafael J. Wysocki
2020-06-13 19:19 ` Rafael J. Wysocki
2020-06-22 13:50 ` [RFT][PATCH v2 0/4] " Rafael J. Wysocki
2020-06-22 13:50 ` Rafael J. Wysocki
2020-06-22 13:52 ` [RFT][PATCH v2 1/4] ACPICA: Defer unmapping of opregion memory if supported by OS Rafael J. Wysocki
2020-06-22 13:52 ` Rafael J. Wysocki
2020-06-22 13:53 ` [RFT][PATCH v2 2/4] ACPI: OSL: Add support for deferred unmapping of ACPI memory Rafael J. Wysocki
2020-06-22 13:53 ` Rafael J. Wysocki
2020-06-22 14:56 ` Andy Shevchenko
2020-06-22 14:56 ` Andy Shevchenko
2020-06-22 15:27 ` Rafael J. Wysocki
2020-06-22 15:27 ` Rafael J. Wysocki
2020-06-22 15:46 ` Andy Shevchenko
2020-06-22 15:46 ` Andy Shevchenko
2020-06-22 14:01 ` [RFT][PATCH v2 3/4] ACPICA: Preserve memory opregion mappings if supported by OS Rafael J. Wysocki
2020-06-22 14:01 ` Rafael J. Wysocki
2020-06-26 22:53 ` Kaneda, Erik
2020-06-26 22:53 ` Kaneda, Erik
2020-06-29 13:02 ` Rafael J. Wysocki
2020-06-29 13:02 ` Rafael J. Wysocki
2020-06-22 14:02 ` [RFT][PATCH v2 4/4] ACPI: OSL: Implement acpi_os_map_memory_fast_path() Rafael J. Wysocki
2020-06-22 14:02 ` Rafael J. Wysocki
2020-06-26 17:28 ` [RFT][PATCH v3 0/4] ACPI: ACPICA / OSL: Avoid unmapping ACPI memory inside of the AML interpreter Rafael J. Wysocki
2020-06-26 17:28 ` Rafael J. Wysocki
2020-06-26 17:31 ` [RFT][PATCH v3 1/4] ACPICA: Take deferred unmapping of memory into account Rafael J. Wysocki
2020-06-26 17:31 ` Rafael J. Wysocki
2020-06-26 17:31 ` [RFT][PATCH v3 2/4] ACPI: OSL: Implement deferred unmapping of ACPI memory Rafael J. Wysocki
2020-06-26 17:31 ` Rafael J. Wysocki
2020-06-27 11:32 ` kernel test robot
2020-06-26 17:32 ` [RFT][PATCH v3 3/4] ACPICA: Preserve memory opregion mappings if supported by OS Rafael J. Wysocki
2020-06-26 17:32 ` Rafael J. Wysocki
2020-06-26 17:33 ` [RFT][PATCH v3 4/4] ACPI: OSL: Implement acpi_os_map_memory_fast_path() Rafael J. Wysocki
2020-06-26 17:33 ` Rafael J. Wysocki
2020-06-26 18:41 ` [RFT][PATCH v3 0/4] ACPI: ACPICA / OSL: Avoid unmapping ACPI memory inside of the AML interpreter Dan Williams
2020-06-26 18:41 ` Dan Williams
2020-06-28 17:09 ` Rafael J. Wysocki
2020-06-28 17:09 ` Rafael J. Wysocki
2020-06-29 20:46 ` Dan Williams
2020-06-29 20:46 ` Dan Williams
2020-06-30 11:04 ` Rafael J. Wysocki
2020-06-30 11:04 ` Rafael J. Wysocki
2020-06-29 16:31 ` [PATCH v4 0/2] " Rafael J. Wysocki
2020-06-29 16:31 ` Rafael J. Wysocki
2020-06-29 16:33 ` [PATCH v4 1/2] ACPI: OSL: Implement deferred unmapping of ACPI memory Rafael J. Wysocki
2020-06-29 16:33 ` Rafael J. Wysocki
2020-06-29 16:33 ` [PATCH v4 2/2] ACPICA: Preserve memory opregion mappings Rafael J. Wysocki
2020-06-29 16:33 ` Rafael J. Wysocki
2020-06-29 20:57 ` Al Stone
2020-06-29 20:57 ` Al Stone
2020-06-30 11:44 ` Rafael J. Wysocki
2020-06-30 11:44 ` Rafael J. Wysocki
2020-06-30 15:31 ` Al Stone
2020-06-30 15:31 ` Al Stone
2020-06-30 15:52 ` Rafael J. Wysocki
2020-06-30 15:52 ` Rafael J. Wysocki
2020-06-30 19:57 ` Al Stone
2020-06-30 19:57 ` Al Stone
2020-07-16 19:22 ` Verma, Vishal L
2020-07-16 19:22 ` Verma, Vishal L
2020-07-19 19:14 ` Rafael J. Wysocki
2020-07-19 19:14 ` Rafael J. Wysocki
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