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Chao Yu 4149f0ee5e f2fs: don't over-report free space or inodes in statvfs 
[ Upstream commit a920196062 ]

This fixes an analogus bug that was fixed in modern filesystems:
a) xfs in commit 4b8d867ca6 ("xfs: don't over-report free space or
inodes in statvfs")
b) ext4 in commit f87d3af741 ("ext4: don't over-report free space
or inodes in statvfs")
where statfs can report misleading / incorrect information where
project quota is enabled, and the free space is less than the
remaining quota.

This commit will resolve a test failure in generic/762 which tests
for this bug.

generic/762       - output mismatch (see /share/git/fstests/results//generic/762.out.bad)
#    --- tests/generic/762.out   2025-04-15 10:21:53.371067071 +0800
#    +++ /share/git/fstests/results//generic/762.out.bad 2025-05-13 16:13:37.000000000 +0800
#    @@ -6,8 +6,10 @@
#     root blocks2 is in range
#     dir blocks2 is in range
#     root bavail2 is in range
#    -dir bavail2 is in range
#    +dir bavail2 has value of 1539066
#    +dir bavail2 is NOT in range 304734.87 .. 310891.13
#     root blocks3 is in range
#    ...
#    (Run 'diff -u /share/git/fstests/tests/generic/762.out /share/git/fstests/results//generic/762.out.bad'  to see the entire diff)

HINT: You _MAY_ be missing kernel fix:
      XXXXXXXXXXXXXX xfs: don't over-report free space or inodes in statvfs

Cc: stable@kernel.org
Fixes: ddc34e328d ("f2fs: introduce f2fs_statfs_project")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-07-06 11:01:37 +02:00
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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 reStructuredText 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.