fb4b49278f
The gem drivers use shmemfs to allocate backing storage for gem objects. On Samsung Chromebook Plus, the drm/rockchip driver may call rockchip_gem_get_pages -> drm_gem_get_pages -> shmem_read_mapping_page to pin a lot of pages, breaking the page reclaim mechanism and causing oom-killer invocation. E.g. when the size of a zone is 3.9 GiB, the inactive_ratio is 5. If active_anon / inactive_anon < 5 and all pages in the inactive_anon lru are pinned, page reclaim would keep scanning inactive_anon lru without reclaiming memory. It breaks page reclaim when the rockchip driver only pins about 1/6 of the anon lru pages. Mark these pinned pages as unevictable to avoid the premature oom-killer invocation. See also similar patch on i915 driver [1]. [1]: https://patchwork.freedesktop.org/patch/msgid/20181106132324.17390-1-chris@chris-wilson.co.uk Signed-off-by: Kuo-Hsin Yang <vovoy@chromium.org> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20190108074517.209860-1-vovoy@chromium.org |
||
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| 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 | ||
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.