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Filename Latest commit message Latest commit date
Kai-Heng Feng 8e6af828a3 nvme-pci: prevent SK hynix PC400 from using Write Zeroes command 
[ Upstream commit 5611ec2b9814bc91f7b0a8d804c1fc152e2025d9 ]

After commit 6e02318eae ("nvme: add support for the Write Zeroes
command"), SK hynix PC400 becomes very slow with the following error
message:

[  224.567695] blk_update_request: operation not supported error, dev nvme1n1, sector 499384320 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0]

SK Hynix PC400 has a buggy firmware that treats NLB as max value instead
of a range, so the NLB passed isn't a valid value to the firmware.

According to SK hynix there are three commands are affected:
- Write Zeroes
- Compare
- Write Uncorrectable

Right now only Write Zeroes is implemented, so disable it completely on
SK hynix PC400.

BugLink: https://bugs.launchpad.net/bugs/1872383
Cc: kyounghwan sohn <kyounghwan.sohn@sk.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-11 15:33:37 +02:00
arch arm64: Workaround circular dependency in pointer_auth.h 2020-08-07 09:34:01 +02:00
block block: fix get_max_segment_size() overflow on 32bit arch 2020-07-22 09:33:17 +02:00
certs
crypto
Documentation
drivers nvme-pci: prevent SK hynix PC400 from using Write Zeroes command 2020-08-11 15:33:37 +02:00
fs io_uring: Fix use-after-free in io_sq_wq_submit_work() 2020-08-11 15:33:33 +02:00
include bpf: sockmap: Require attach_bpf_fd when detaching a program 2020-08-07 09:34:02 +02:00
init
ipc
kernel perf/core: Fix endless multiplex timer 2020-08-11 15:33:32 +02:00
lib random32: remove net_rand_state from the latent entropy gcc plugin 2020-08-07 09:34:01 +02:00
LICENSES
mm mm/filemap.c: don't bother dropping mmap_sem for zero size readahead 2020-08-05 09:59:41 +02:00
net net/9p: validate fds in p9_fd_open 2020-08-11 15:33:36 +02:00
samples
scripts scripts: add dummy report mode to add_namespace.cocci 2020-08-11 15:33:35 +02:00
security Smack: fix use-after-free in smk_write_relabel_self() 2020-08-11 15:33:35 +02:00
sound ALSA: seq: oss: Serialize ioctls 2020-08-11 15:33:33 +02:00
tools selftests: bpf: Fix detach from sockmap tests 2020-08-07 09:34:02 +02:00
usr
virt KVM: arm64: Don't inherit exec permission across page-table levels 2020-08-05 09:59:51 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.57 2020-08-07 09:34:02 +02:00
README

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.