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Mainline Linux tree for various devices, only for fun :)
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Sagi Grimberg 72e3b8883a nvme-multipath: fix possible hang in live ns resize with ANA access 
When we revalidate paths as part of ns size change (as of commit
e7d65803e2), it is possible that during the path revalidation, the
only paths that is IO capable (i.e. optimized/non-optimized) are the
ones that ns resize was not yet informed to the host, which will cause
inflight requests to be requeued (as we have available paths but none
are IO capable). These requests on the requeue list are waiting for
someone to resubmit them at some point.

The IO capable paths will eventually notify the ns resize change to the
host, but there is nothing that will kick the requeue list to resubmit
the queued requests.

Fix this by always kicking the requeue list, and if no IO capable path
exists, these requests will be queued again.

A typical log that indicates that IOs are requeued:
--
nvme nvme1: creating 4 I/O queues.
nvme nvme1: new ctrl: "testnqn1"
nvme nvme2: creating 4 I/O queues.
nvme nvme2: mapped 4/0/0 default/read/poll queues.
nvme nvme2: new ctrl: NQN "testnqn1", addr 127.0.0.1:8009
nvme nvme1: rescanning namespaces.
nvme1n1: detected capacity change from 2097152 to 4194304
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
nvme nvme2: rescanning namespaces.
--

Reported-by: Yogev Cohen <yogev@lightbitslabs.com>
Fixes: e7d65803e2 ("nvme-multipath: revalidate paths during rescan")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Cc: <stable@vger.kernel.org> # v5.15+
Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-10-12 11:42:58 +02:00
arch powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
block Merge branch 'for-6.1/block' into block-6.1 2022-10-10 11:26:40 -06:00
certs certs: make system keyring depend on built-in x509 parser 2022-09-24 04:31:18 +09:00
crypto crypto: blake2b: effectively disable frame size warning 2022-08-10 17:59:11 -07:00
Documentation powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
drivers nvme-multipath: fix possible hang in live ns resize with ANA access 2022-10-12 11:42:58 +02:00
fs ucounts: Split rlimit and ucount values and max values 2022-10-09 16:24:05 -07:00
include Merge branch 'for-6.1/block' into block-6.1 2022-10-10 11:26:40 -06:00
init powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
io_uring for-6.1/passthrough-2022-10-04 2022-10-07 09:35:50 -07:00
ipc ipc: mqueue: fix possible memory leak in init_mqueue_fs() 2022-10-09 16:10:22 -07:00
kernel ucounts: Split rlimit and ucount values and max values 2022-10-09 16:24:05 -07:00
lib Driver core changes for 6.1-rc1 2022-10-07 17:04:10 -07:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm The first batch of KVM patches, mostly covering x86, which I 2022-10-09 09:39:55 -07:00
net Driver core changes for 6.1-rc1 2022-10-07 17:04:10 -07:00
rust Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
samples ARM: driver updates for 6.1 2022-10-06 11:04:57 -07:00
scripts Networking changes for 6.1. 2022-10-04 13:38:03 -07:00
security powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
sound sound updates for 6.1-rc1 2022-10-05 12:02:07 -07:00
tools powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: remove KVM_REQ_UNHALT 2022-09-26 12:37:21 -04:00
.clang-format PCI/DOE: Add DOE mailbox support functions 2022-07-19 15:38:04 -07:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap The first batch of KVM patches, mostly covering x86, which I 2022-10-09 09:39:55 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS drm for 5.20/6.0 2022-08-03 19:52:08 -07:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge branch 'for-6.1/block' into block-6.1 2022-10-10 11:26:40 -06:00
Makefile hardening updates for v6.1-rc1 2022-10-03 17:24:22 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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.