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Matthew Brost 627c961d67 drm/xe: Add timeout to preempt fences
To adhere to dma fencing rules that fences must signal within a
reasonable amount of time, add a 5 second timeout to preempt fences. If
this timeout occurs, kill the associated VM as this fatal to the VM.

v2:
 - Add comment for smp_wmb (Checkpatch)
 - Fix kernel doc typo (Inspection)
 - Add comment for killed check (Niranjana)
v3:
 - Drop smp_wmb (Matthew Auld)
 - Don't take vm->lock in preempt fence worker (Matthew Auld)
 - Drop RB given changes to patch
v4:
 - Add WRITE/READ_ONCE (Niranjana)
 - Don't export xe_vm_kill (Niranjana)

Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Tested-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240626004137.4060806-1-matthew.brost@intel.com
History 2024-07-03 15:27:50 -07:00
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README

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.