9bb56d5925
congestion_wait() in this context is just a sleep - block devices do not
support congestion signalling any more.
The goal for this wait, which was introduced in commit ae78bf9c4f5f
("[PATCH] add -o flush for fat") is to wait for any recently written
data to get to storage. We currently have no direct mechanism to do
this, so a simple wait that behaves identically to the current
congestion_wait() is the best we can do.
This is a step towards removing congestion_wait()
Link: https://lkml.kernel.org/r/163936544519.22433.13400436295732112065@noble.neil.brown.name
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@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.