From: Gregory Price <gregory.price@memverge.com>
To: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
linux-cxl@vger.kernel.org, David Hildenbrand <david@redhat.com>,
Kees Cook <keescook@chromium.org>,
stable@vger.kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
Michal Hocko <mhocko@suse.com>,
linux-mm@kvack.org, linux-acpi@vger.kernel.org,
qemu-devel@nongnu.org
Subject: Re: [PATCH 00/18] CXL RAM and the 'Soft Reserved' => 'System RAM' default
Date: Sat, 18 Feb 2023 04:47:54 -0500 [thread overview]
Message-ID: <Y/CeykFm6A4vYw7P@memverge.com> (raw)
In-Reply-To: <20230215100327.0000728f@Huawei.com>
On Wed, Feb 15, 2023 at 10:03:27AM +0000, Jonathan Cameron wrote:
> On Tue, 14 Feb 2023 16:54:02 -0500
> Gregory Price <gregory.price@memverge.com> wrote:
>
> > Just clarifying one thing: Even with the patch, KVM blows up.
> > Disabling KVM fixes this entirely. I haven't tested without KVM but
> > with the patch, i will do that now.
>
> yup. The patch only fixes TCG so that's expected behavior.
>
> Fingers crossed on this 'working'.
>
> I'm open to suggestions on how to work around the problem with KVM
> or indeed allow TCG to cache the instructions (right not it has
> to fetch and emulate each instruction on it's own).
>
> I can envision how we might do it for KVM with userspace page fault handling
> used to get a fault up to QEMU which can then stitch in a cache
> of the underlying memory as a stage 2 translation to the page (a little
> bit like how post migration copy works) though I've not prototyped
> anything...
>
Just following up. With the patch applied and KVM turned off, no crash.
I've been working with this for a while.
We should move the instruction alignment issue into a separate
discussion thread.
prev parent reply other threads:[~2023-02-21 15:11 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-06 1:02 Dan Williams
2023-02-06 1:02 ` [PATCH 01/18] cxl/Documentation: Update references to attributes added in v6.0 Dan Williams
2023-02-06 15:17 ` Jonathan Cameron
2023-02-06 16:37 ` Gregory Price
2023-02-06 17:27 ` [PATCH 1/18] " Davidlohr Bueso
2023-02-06 19:15 ` [PATCH 01/18] " Ira Weiny
2023-02-06 21:04 ` Dave Jiang
2023-02-09 0:20 ` Verma, Vishal L
2023-02-06 1:02 ` [PATCH 02/18] cxl/region: Add a mode attribute for regions Dan Williams
2023-02-06 15:46 ` Jonathan Cameron
2023-02-06 17:47 ` Dan Williams
2023-02-06 16:39 ` Gregory Price
2023-02-06 19:16 ` Ira Weiny
2023-02-06 21:05 ` Dave Jiang
2023-02-09 0:22 ` Verma, Vishal L
2023-02-06 1:02 ` [PATCH 03/18] cxl/region: Support empty uuids for non-pmem regions Dan Williams
2023-02-06 15:54 ` Jonathan Cameron
2023-02-06 18:07 ` Dan Williams
2023-02-06 19:22 ` Ira Weiny
2023-02-06 19:35 ` Dan Williams
2023-02-09 0:24 ` Verma, Vishal L
2023-02-06 1:02 ` [PATCH 04/18] cxl/region: Validate region mode vs decoder mode Dan Williams
2023-02-06 16:02 ` Jonathan Cameron
2023-02-06 18:14 ` Dan Williams
2023-02-06 16:44 ` Gregory Price
2023-02-06 21:51 ` Dan Williams
2023-02-06 19:55 ` Gregory Price
2023-02-06 19:23 ` Ira Weiny
2023-02-06 22:16 ` Dave Jiang
2023-02-09 0:25 ` Verma, Vishal L
2023-02-06 1:02 ` [PATCH 05/18] cxl/region: Add volatile region creation support Dan Williams
2023-02-06 16:18 ` Jonathan Cameron
2023-02-06 18:19 ` Dan Williams
2023-02-06 16:55 ` Gregory Price
2023-02-06 21:57 ` Dan Williams
2023-02-06 19:56 ` Gregory Price
2023-02-06 19:25 ` Ira Weiny
2023-02-06 22:31 ` Dave Jiang
2023-02-06 22:37 ` Dan Williams
2023-02-09 1:02 ` Verma, Vishal L
2023-02-06 1:03 ` [PATCH 06/18] cxl/region: Refactor attach_target() for autodiscovery Dan Williams
2023-02-06 17:06 ` Jonathan Cameron
2023-02-06 18:48 ` Dan Williams
2023-02-06 19:26 ` Ira Weiny
2023-02-06 22:41 ` Dave Jiang
2023-02-09 1:09 ` Verma, Vishal L
2023-02-06 1:03 ` [PATCH 07/18] cxl/region: Move region-position validation to a helper Dan Williams
2023-02-06 17:44 ` Ira Weiny
2023-02-06 19:15 ` Dan Williams
2023-02-08 12:30 ` Jonathan Cameron
2023-02-09 4:09 ` Dan Williams
2023-02-09 4:26 ` Dan Williams
2023-02-09 11:07 ` Jonathan Cameron
2023-02-09 20:52 ` Dan Williams
2023-02-09 19:45 ` Verma, Vishal L
2023-02-06 1:03 ` [PATCH 08/18] kernel/range: Uplevel the cxl subsystem's range_contains() helper Dan Williams
2023-02-06 17:02 ` Gregory Price
2023-02-06 22:01 ` Dan Williams
2023-02-06 19:28 ` Ira Weiny
2023-02-06 23:41 ` Dave Jiang
2023-02-08 12:32 ` Jonathan Cameron
2023-02-09 19:47 ` Verma, Vishal L
2023-02-06 1:03 ` [PATCH 09/18] cxl/region: Enable CONFIG_CXL_REGION to be toggled Dan Williams
2023-02-06 17:03 ` Gregory Price
2023-02-06 23:57 ` Dave Jiang
2023-02-08 12:36 ` Jonathan Cameron
2023-02-09 20:17 ` Verma, Vishal L
2023-02-06 1:03 ` [PATCH 10/18] cxl/region: Fix passthrough-decoder detection Dan Williams
2023-02-06 5:38 ` Greg KH
2023-02-06 17:22 ` Dan Williams
2023-02-07 0:00 ` Dave Jiang
2023-02-08 12:44 ` Jonathan Cameron
2023-02-09 20:28 ` Verma, Vishal L
2023-02-06 1:03 ` [PATCH 11/18] cxl/region: Add region autodiscovery Dan Williams
2023-02-06 19:02 ` Ira Weiny
2023-02-07 23:54 ` Dave Jiang
2023-02-08 17:07 ` Jonathan Cameron
2023-02-09 4:07 ` Dan Williams
2023-02-06 1:03 ` [PATCH 12/18] tools/testing/cxl: Define a fixed volatile configuration to parse Dan Williams
2023-02-08 17:31 ` Jonathan Cameron
2023-02-09 20:50 ` Dan Williams
2023-02-06 1:03 ` [PATCH 13/18] dax/hmem: Move HMAT and Soft reservation probe initcall level Dan Williams
2023-02-06 1:03 ` [PATCH 14/18] dax/hmem: Drop unnecessary dax_hmem_remove() Dan Williams
2023-02-06 17:15 ` Gregory Price
2023-02-08 17:33 ` Jonathan Cameron
2023-02-06 1:03 ` [PATCH 15/18] dax/hmem: Convey the dax range via memregion_info() Dan Williams
2023-02-08 17:35 ` Jonathan Cameron
2023-02-06 1:03 ` [PATCH 16/18] dax/hmem: Move hmem device registration to dax_hmem.ko Dan Williams
2023-02-06 1:04 ` [PATCH 17/18] dax: Assign RAM regions to memory-hotplug by default Dan Williams
2023-02-06 17:26 ` Gregory Price
2023-02-06 22:15 ` Dan Williams
2023-02-06 19:05 ` Gregory Price
2023-02-06 23:20 ` Dan Williams
2023-02-06 1:04 ` [PATCH 18/18] cxl/dax: Create dax devices for CXL RAM regions Dan Williams
2023-02-06 5:36 ` [PATCH 00/18] CXL RAM and the 'Soft Reserved' => 'System RAM' default Gregory Price
2023-02-06 16:40 ` Davidlohr Bueso
2023-02-06 18:23 ` Dan Williams
2023-02-06 17:29 ` Dan Williams
2023-02-06 17:18 ` Davidlohr Bueso
[not found] ` <CGME20230208173730uscas1p2af3a9eeb8946dfa607b190c079a49653@uscas1p2.samsung.com>
2023-02-08 17:37 ` Fan Ni
2023-02-09 4:56 ` Dan Williams
2023-02-13 12:13 ` David Hildenbrand
2023-02-14 18:45 ` Dan Williams
2023-02-14 18:27 ` Gregory Price
2023-02-14 18:39 ` Dan Williams
2023-02-14 19:01 ` Gregory Price
2023-02-14 21:18 ` Jonathan Cameron
2023-02-14 21:51 ` Gregory Price
2023-02-14 21:54 ` Gregory Price
2023-02-15 10:03 ` Jonathan Cameron
2023-02-18 9:47 ` Gregory Price [this message]
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