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David Howells <dhowells@redhat.com> says: Here are some miscellaneous fixes and changes for netfslib and the ceph and nfs filesystems: (1) Ignore silly-rename files from afs and nfs when building the header archive in a kernel build. (2) netfs: Fix the way read result collection applies results to folios when each folio is being read by multiple subrequests and the results come out of order. (3) netfs: Fix ENOMEM handling in buffered reads. (4) nfs: Fix an oops in nfs_netfs_init_request() when copying to the cache. (5) cachefiles: Parse the "secctx" command immediately to get the correct error rather than leaving it to the "bind" command. (6) netfs: Remove a redundant smp_rmb(). This isn't a bug per se and could be deferred. (7) netfs: Fix missing barriers by using clear_and_wake_up_bit(). (8) netfs: Work around recursion in read retry by failing and abandoning the retried subrequest if no I/O is performed. [!] NOTE: This only works around the recursion problem if the recursion keeps returning no data. If the server manages, say, to repeatedly return a single byte of data faster than the retry algorithm can complete, it will still recurse and the stack overrun may still occur. Actually fixing this requires quite an intrusive change which will hopefully make the next merge window. (9) netfs: Fix the clearance of a folio_queue when unlocking the page if we're going to want to subsequently send the queue for copying to the cache (if, for example, we're using ceph). (10) netfs: Fix the lack of cancellation of copy-to-cache when the cache for a file is temporarily disabled (for example when a DIO write is done to the file). This patch and (9) fix hangs with ceph. With these patches, I can run xfstest -g quick to completion on ceph with a local cache. The patches can also be found here with a bonus cifs patch: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=netfs-fixes * patches from https://lore.kernel.org/r/20241213135013.2964079-1-dhowells@redhat.com: netfs: Fix is-caching check in read-retry netfs: Fix the (non-)cancellation of copy when cache is temporarily disabled netfs: Fix ceph copy to cache on write-begin netfs: Work around recursion by abandoning retry if nothing read netfs: Fix missing barriers by using clear_and_wake_up_bit() netfs: Remove redundant use of smp_rmb() cachefiles: Parse the "secctx" immediately nfs: Fix oops in nfs_netfs_init_request() when copying to cache netfs: Fix enomem handling in buffered reads netfs: Fix non-contiguous donation between completed reads kheaders: Ignore silly-rename files Link: https://lore.kernel.org/r/20241213135013.2964079-1-dhowells@redhat.com Signed-off-by: Christian Brauner <brauner@kernel.org>
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.