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| author | Stefan Metzmacher <metze@samba.org> | 2022-10-27 21:34:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 15:33:11 +0300 |
| commit | 3a6ee45e3ceb60818c5fa4acd3c258bb124452a8 (patch) | |
| tree | 7b758b7fb4ad7d1c75796df3f7aa660687225a2b /include/uapi/linux/atmclip.h | |
| parent | 215f9437dda09531bcb80605298a24219f01cec5 (diff) | |
| download | linux-3a6ee45e3ceb60818c5fa4acd3c258bb124452a8.tar.xz | |
io_uring/net: introduce IORING_SEND_ZC_REPORT_USAGE flag
commit e307e6698165ca6508ed42c69cb1be76c8eb6a3c upstream.
It might be useful for applications to detect if a zero copy transfer with
SEND[MSG]_ZC was actually possible or not. The application can fallback to
plain SEND[MSG] in order to avoid the overhead of two cqes per request. Or
it can generate a log message that could indicate to an administrator that
no zero copy was possible and could explain degraded performance.
Cc: stable@vger.kernel.org # 6.1
Link: https://lore.kernel.org/io-uring/fb6a7599-8a9b-15e5-9b64-6cd9d01c6ff4@gmail.com/T/#m2b0d9df94ce43b0e69e6c089bdff0ce6babbdfaa
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8945b01756d902f5d5b0667f20b957ad3f742e5e.1666895626.git.metze@samba.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/linux/atmclip.h')
0 files changed, 0 insertions, 0 deletions