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572a3d1e5dIt is particularly important for the userns mount case (when a sensible nr_inodes maximum may not be enforced) that tmpfs user xattrs be subject to memory cgroup limiting. Leave temporary buffer allocations as is, but change the persistent simple xattr allocations from GFP_KERNEL to GFP_KERNEL_ACCOUNT. This limits kernfs's cgroupfs too, but that's good. (I had intended to send this change earlier, but had been confused by shmem_alloc_inode() using GFP_KERNEL, and thought a discussion would be needed to change that too: no, I was forgetting the SLAB_ACCOUNT on that kmem_cache, which implicitly adds __GFP_ACCOUNT to all its allocations.) Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Jan Kara <jack@suse.cz> Message-Id: <f6953e5a-4183-8314-38f2-40be60998615@google.com> Signed-off-by: Christian Brauner <brauner@kernel.org> |
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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.