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3258386aba
Change the retry policy in ext4_alloc_file_blocks() to allow for a full retry cycle whenever a portion of an allocation request has been fulfilled. A large allocation request often results in multiple calls to ext4_map_blocks(), each of which is potentially subject to a temporary ENOSPC condition and retry cycle. The current code only allows for a single retry cycle. This patch does not address a known bug or reported complaint. However, it should make block allocation for fallocate and zero range more robust. In addition, simplify the conditional controlling the allocation while loop, where testing len alone is sufficient. Remove the assignment to ret2 in the error path after the call to ext4_map_blocks() since its value isn't subsequently used. Signed-off-by: Eric Whitney <enwlinux@gmail.com> Link: https://lore.kernel.org/r/20210113221403.18258-1-enwlinux@gmail.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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.