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A mirror of the official Linux kernel repository just in case
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David Gow 92653f2a57 drm/i915: Attempt to get pages without eviction first 
In commit a78a8da51b ("drm/ttm: replace busy placement with flags v6"),
__i915_ttm_get_pages was updated to use flags instead of the separate
'busy' placement list. However, the behaviour was subtly changed.
Originally, the function would attempt to use the preferred placement
without eviction, and give an opportunity to restart the operation
before falling back to allowing eviction.

This was unintentionally changed, as the preferred placement was not
given the TTM_PL_FLAG_DESIRED flag, and so eviction could be triggered
in that first pass. This caused thrashing, and a significant performance
regression on DG2 systems with small BAR. For example, Minecraft and
Team Fortress 2 would drop to single-digit framerates.

Restore the original behaviour by marking the initial placement as
desired on that first attempt. Also, rework this to use a separate
struct ttm_palcement, as the individual placements are marked 'const',
so hot-patching the flags is even more dodgy than before.

Thanks to Justin Brewer for bisecting this.

Fixes: a78a8da51b ("drm/ttm: replace busy placement with flags v6")
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11255
Signed-off-by: David Gow <david@davidgow.net>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240804091851.122186-3-david@davidgow.net
2024-08-06 14:13:23 +01:00
arch Linux 6.9-rc6 2024-04-29 20:22:39 +02:00
block vfs-6.9-rc6.fixes 2024-04-26 11:01:28 -07:00
certs This update includes the following changes: 2023-11-02 16:15:30 -10:00
crypto This push fixes a regression that broke iwd as well as a divide by 2024-03-25 10:48:23 -07:00
Documentation Merge tag 'drm-msm-next-2024-05-07' of https://gitlab.freedesktop.org/drm/msm into drm-next 2024-05-10 10:22:59 +10:00
drivers drm/i915: Attempt to get pages without eviction first 2024-08-06 14:13:23 +01:00
fs three smb3 client fixes, all also for stable 2024-04-27 11:35:40 -07:00
include drm/i915: Support replaying GPU hangs with captured context image 2024-05-16 07:37:05 +00:00
init Rust fixes for v6.9 2024-04-27 12:11:55 -07:00
io_uring io_uring/net: restore msg_control on sendzc retry 2024-04-08 21:48:41 -06:00
ipc sysctl changes for v6.9-rc1 2024-03-18 14:59:13 -07:00
kernel Misc fixes: 2024-04-28 12:11:26 -07:00
lib 11 hotfixes. 8 are cc:stable and the remaining 3 (nice ratio!) address 2024-04-26 13:48:03 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm/hugetlb: fix DEBUG_LOCKS_WARN_ON(1) when dissolve_free_hugetlb_folio() 2024-04-25 10:07:27 -07:00
net Including fixes from netfilter, wireless and bluetooth. 2024-04-25 11:19:38 -07:00
rust rust: remove params from module macro example 2024-04-25 17:34:33 +02:00
samples Tracing updates for 6.9: 2024-03-18 15:11:44 -07:00
scripts Rust fixes for v6.9 2024-04-27 12:11:55 -07:00
security security: Place security_path_post_mknod() where the original IMA call was 2024-04-03 10:21:32 -07:00
sound ALSA: seq: ump: Fix conversion from MIDI2 to MIDI1 UMP messages 2024-04-19 12:07:14 +02:00
tools RISC-V Fixes for 6.9-rc6 2024-04-27 12:02:55 -07:00
usr Kbuild updates for v6.8 2024-01-18 17:57:07 -08:00
virt KVM: Drop unused @may_block param from gfn_to_pfn_cache_invalidate_start() 2024-04-11 12:58:53 -07:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap Including fixes from netfilter, wireless and bluetooth. 2024-04-25 11:19:38 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Drop Gustavo Pimentel as PCI DWC Maintainer 2024-03-27 13:41:02 -05:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge tag 'drm-msm-next-2024-05-07' of https://gitlab.freedesktop.org/drm/msm into drm-next 2024-05-10 10:22:59 +10:00
Makefile Linux 6.9-rc6 2024-04-28 13:47:24 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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.