df6f0f1d0c
Currently if z3fold couldn't find an unbuddied page it would first try to pull a page off the stale list. But this approach is problematic. If init z3fold page fails later, the page should be freed via free_z3fold_page to clean up the relevant resource instead of using __free_page directly. And if page is successfully reused, it will BUG_ON later in __SetPageMovable because it's already non-lru movable page, i.e. PAGE_MAPPING_MOVABLE is already set in page->mapping. In order to fix all of these issues, we can simply remove the buggy use of stale list for allocation because can_sleep should always be false and we never really hit the reusing code path now. Link: https://lkml.kernel.org/r/20220429064051.61552-4-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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.