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1cbf0a5884
Since commite509ad4d77("ext4: use bdev_getblk() to avoid memory reclaim in readahead path") rightly replaced GFP_NOFAIL allocations by GFP_NOWAIT allocations, I've occasionally been seeing "page allocation failure: order:0" warnings under load: all with ext4_sb_breadahead_unmovable() in the stack. I don't think those warnings are of any interest: suppress them with __GFP_NOWARN. Link: https://lkml.kernel.org/r/7bc6ad16-9a4d-dd90-202e-47d6cbb5a136@google.com Fixes:e509ad4d77("ext4: use bdev_getblk() to avoid memory reclaim in readahead path") Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Hui Zhu <teawater@antgroup.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Theodore Ts'o <tytso@mit.edu> 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.