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This will be used to implement a logic in order to make sure we don't overflow the send submission queue for ib_post_send(). We will initialize the local credits with the fixed sp->send_credit_target value, which matches the reserved slots in the submission queue for ib_post_send(). We will be a local credit first and then wait for a remote credit, if we managed to get both we are allowed to post an IB_WR_SEND[_WITH_INV]. The local credit is given back to the pool when we get the local ib_post_send() completion, while remote credits are granted by the peer. From reading the git history of the linux smbdirect implementations in client and server) it was seen that a peer granted more credits than we requested. I guess that only happened because of bugs in our implementation which was active as client and server. I guess Windows won't do that. So the local credits make sure we only use the amount of credits we asked for. The client already has some logic for this based on smbdirect_socket.send_io.pending.count, but that counts in the order direction and makes it complex it share common logic for various credits classes. That logic will be replaced soon. Cc: Steve French <smfrench@gmail.com> Cc: Tom Talpey <tom@talpey.com> Cc: Long Li <longli@microsoft.com> Cc: Namjae Jeon <linkinjeon@kernel.org> Cc: linux-cifs@vger.kernel.org Cc: samba-technical@lists.samba.org Signed-off-by: Stefan Metzmacher <metze@samba.org> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> |
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| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.