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750e81e2db
commit ce4cc3133dc72c31bd49ddcf22d0f9eeff47a761 upstream. The write zeros command does not work with 4k range. bash-4.4# ./blkdiscard /dev/nvme0n1p2 bash-4.4# strace -efallocate xfs_io -c "fzero 536895488 2048" /dev/nvme0n1p2 fallocate(3, FALLOC_FL_ZERO_RANGE, 536895488, 2048) = 0 +++ exited with 0 +++ bash-4.4# dd bs=1 if=/dev/nvme0n1p2 skip=536895488 count=512 | hexdump -C 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000200 bash-4.4# ./blkdiscard /dev/nvme0n1p2 bash-4.4# strace -efallocate xfs_io -c "fzero 536895488 4096" /dev/nvme0n1p2 fallocate(3, FALLOC_FL_ZERO_RANGE, 536895488, 4096) = 0 +++ exited with 0 +++ bash-4.4# dd bs=1 if=/dev/nvme0n1p2 skip=536895488 count=512 | hexdump -C 00000000 5c 61 5c b0 96 21 1b 5e 85 0c 07 32 9c 8c eb 3c |\a\..!.^...2...<| 00000010 4a a2 06 ca 67 15 2d 8e 29 8d a8 a0 7e 46 8c 62 |J...g.-.)...~F.b| 00000020 bb 4c 6c c1 6b f5 ae a5 e4 a9 bc 93 4f 60 ff 7a |.Ll.k.......O`.z| Reported-by: Eric Sandeen <esandeen@redhat.com> Signed-off-by: David Milburn <dmilburn@redhat.com> Tested-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> [ Fix-up for 5.4 since NVME_QUIRK_NO_TEMP_THRESH_CHANGE doesn't exist ] Signed-off-by: Jason Andryuk <jandryuk@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| 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.