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76a46e066e
If you prep a read (for example) that needs to get punted to async context with a timer, if the timeout is sufficiently short, the timer request will get completed with -ENOENT as it could not find the read. The issue is that we prep and start the timer before we start the read. Hence the timer can trigger before the read is even started, and the end result is then that the timer completes with -ENOENT, while the read starts instead of being cancelled by the timer. Fix this by splitting the linked timer into two parts: 1) Prep and validate the linked timer 2) Start timer The read is then started between steps 1 and 2, so we know that the timer will always have a consistent view of the read request state. Reported-by: Hrvoje Zeba <zeba.hrvoje@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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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.