de2e517143
When handling MADV_WILLNEED in madvise(), a soflockup may occurr in swapin_walk_pmd_entry() if swapping in lots of memory on a slow device. Add a cond_resched() to avoid the possible softlockup. Link: https://lkml.kernel.org/r/20221205140327.72304-1-wangkefeng.wang@huawei.com Fixes: 1998cc048901 ("mm: make madvise(MADV_WILLNEED) support swap file prefetch") Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Shaohua Li <shli@fusionio.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.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.