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Re: [PATCH v2 0/8] pdx: introduce a new compression algorithm
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Date: Mon, 30 Jun 2025 20:33:54 -0700 (PDT)
- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Community Manager <community.manager@xxxxxxxxxxxxxx>
- Delivery-date: Tue, 01 Jul 2025 03:34:18 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, 30 Jun 2025, Stefano Stabellini wrote:
> I added some debug messages (see
> attached stefano-debug.patch). Something seems to be wrong with the
> pdx_group_valid bitmap after 0x880000, as we start getting MFN ranges
> such as 0x254c0000-0x25500000 which don't make any sense to me.
>From what I can see the first time setup_directmap_mappings is called
with base_mfn=50000000, __mfn_to_virt goes wrong and triggers the ASSERT
in maddr_to_virt.
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