901341bb97
Currently, io_uring's recvmsg subscribes to both POLLERR and POLLIN. In the context of TCP tx zero-copy, this is inefficient since we are only reading the error queue and not using recvmsg to read POLLIN responses. This patch was tested by using a simple sending program to call recvmsg using io_uring with MSG_ERRQUEUE set and verifying with printks that the POLLIN is correctly unset when the msg flags are MSG_ERRQUEUE. Signed-off-by: Arjun Roy <arjunroy@google.com> Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Luke Hsiao <lukehsiao@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.