mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-07 11:26:02 +09:00
a2f02a87fe
[ Upstream commit 71257925e83eae1cb6913d65ca71927d2220e6d1 ]
Procedures for nvme-mpath IO accounting:
1) initialize nvme_request and clear flags;
2) set NVME_MPATH_IO_STATS and increase inflight counter when IO
started;
3) check NVME_MPATH_IO_STATS and decrease inflight counter when IO is
done;
However, for the case nvme_fail_nonready_command(), both step 1) and 2)
are skipped, and if old nvme_request set NVME_MPATH_IO_STATS and then
request is reused, step 3) will still be executed, causing inflight I/O
counter to be negative.
Fix the problem by clearing nvme_request in nvme_fail_nonready_command().
Fixes: ea5e5f42cd ("nvme-fabrics: avoid double completions in nvmf_fail_nonready_command")
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Closes: https://lore.kernel.org/all/CAHj4cs_+dauobyYyP805t33WMJVzOWj=7+51p4_j9rA63D9sog@mail.gmail.com/
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.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.