Linux mainline fork with MSM8998 patches | https://mainline.space | Currently supported devices:
OnePlus 5/5T, Xiaomi Mi 6, F(x)tec Pro¹ (2019 QX1000 model) & Sony Xperia XZ Premium (UNTESTED!)
b2fe31cf64
We hit soft hang while doing memory pressure test on one numa system. After a qucik look, this is because kfd invalid/valid userptr memory frequently with process_info lock hold. Looks like update page table mapping use too much cpu time. perf top says below, 75.81% [kernel] [k] __srcu_read_unlock 6.19% [amdgpu] [k] amdgpu_gmc_set_pte_pde 3.56% [kernel] [k] __srcu_read_lock 2.20% [amdgpu] [k] amdgpu_vm_cpu_update 2.20% [kernel] [k] __sg_page_iter_dma_next 2.15% [drm] [k] drm_dev_enter 1.70% [drm] [k] drm_prime_sg_to_dma_addr_array 1.18% [kernel] [k] __sg_alloc_table_from_pages 1.09% [drm] [k] drm_dev_exit So move drm_dev_enter/exit outside gmc code, instead let caller do it. They are gart_unbind, gart_map, vm_clear_bo, vm_update_pdes and gmc_init_pdb0. vm_bo_update_mapping already calls it. Signed-off-by: xinhui pan <xinhui.pan@amd.com> Reviewed-and-tested-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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 Restructured Text 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.