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Yang Shi
fa1e512fac
Shakeel Butt reported premature oom on kernel with "cgroup_disable=memory" since mem_cgroup_is_root() returns false even though memcg is actually NULL. The drop_caches is also broken. It is because commitaeed1d325d("mm/vmscan.c: generalize shrink_slab() calls in shrink_node()") removed the !memcg check before !mem_cgroup_is_root(). And, surprisingly root memcg is allocated even though memory cgroup is disabled by kernel boot parameter. Add mem_cgroup_disabled() check to make reclaimer work as expected. Link: http://lkml.kernel.org/r/[email protected] Fixes:aeed1d325d("mm/vmscan.c: generalize shrink_slab() calls in shrink_node()") Signed-off-by: Yang Shi <[email protected]> Reported-by: Shakeel Butt <[email protected]> Reviewed-by: Shakeel Butt <[email protected]> Reviewed-by: Kirill Tkhai <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Jan Hadrava <[email protected]> Cc: Vladimir Davydov <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Roman Gushchin <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Qian Cai <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: <[email protected]> [4.19+] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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.