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adcc0aef9e
We've found that there are cases where a transport disconnection results in the loss of callback RPCs. NFS servers typically do not retransmit callback operations after a disconnect. This can be a problem for the Linux NFS client's current implementation of asynchronous COPY, which waits indefinitely for a CB_OFFLOAD callback. If a transport disconnect occurs while an async COPY is running, there's a good chance the client will never get the completing CB_OFFLOAD. Fix this by implementing the OFFLOAD_STATUS operation so that the Linux NFS client can probe the NFS server if it doesn't see a CB_OFFLOAD in a reasonable amount of time. This patch implements a simplistic check. As future work, the client might also be able to detect whether there is no forward progress on the request asynchronous COPY operation, and CANCEL it. Suggested-by: Olga Kornievskaia <kolga@netapp.com> Link: https://bugzilla.kernel.org/show_bug.cgi?id=218735 Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Benjamin Coddington <bcodding@redhat.com> Link: https://lore.kernel.org/r/20250113153235.48706-15-cel@kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> |
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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 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.