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In scenarios involving double migration, the VF KMD may encounter situations where it is instructed to re-migrate before having the opportunity to send RESFIX_DONE for the initial migration. This can occur when the fix-up for the prior migration is still underway, but the VF KMD is migrated again. Consequently, this may lead to the possibility of sending two migration notifications (i.e., pending fix-up for the first migration and a second notification for the new migration). Upon receiving the first RES_FIX notification, the GuC will resume VF submission on the GPU, potentially resulting in undefined behavior, such as system hangs or crashes. To avoid this, post migration, a marker is sent to the GUC prior to the start of resource fixups to indicate start of resource fixups. The same marker is sent along with RESFIX_DONE notification so that GUC can avoid submitting jobs to HW in case of double migration. Signed-off-by: Satyanarayana K V P <satyanarayana.k.v.p@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Tomasz Lis <tomasz.lis@intel.com> Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Link: https://patch.msgid.link/20251201095011.21453-8-satyanarayana.k.v.p@intel.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.