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author | David Howells <dhowells@redhat.com> | 2019-05-09 08:21:21 +0100 |
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committer | David Howells <dhowells@redhat.com> | 2019-05-16 16:25:20 +0100 |
commit | b960a34b73e4c1c972623bc2076e24b97588d09e (patch) | |
tree | b7fafd6110ffa1aed594d55097755eea65da5d8d /Documentation/networking/af_xdp.rst | |
parent | 0ab4c9594812c4bc5606daf0677ae304bf7ec8c8 (diff) | |
download | linux-b960a34b73e4c1c972623bc2076e24b97588d09e.tar.gz linux-b960a34b73e4c1c972623bc2076e24b97588d09e.tar.bz2 linux-b960a34b73e4c1c972623bc2076e24b97588d09e.zip |
rxrpc: Allow the kernel to mark a call as being non-interruptible
Allow kernel services using AF_RXRPC to indicate that a call should be
non-interruptible. This allows kafs to make things like lock-extension and
writeback data storage calls non-interruptible.
If this is set, signals will be ignored for operations on that call where
possible - such as waiting to get a call channel on an rxrpc connection.
It doesn't prevent UDP sendmsg from being interrupted, but that will be
handled by packet retransmission.
rxrpc_kernel_recv_data() isn't affected by this since that never waits,
preferring instead to return -EAGAIN and leave the waiting to the caller.
Userspace initiated calls can't be set to be uninterruptible at this time.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'Documentation/networking/af_xdp.rst')
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