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author | Paul Durrant <paul.durrant@citrix.com> | 2019-04-08 16:16:17 +0100 |
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committer | Anthony PERARD <anthony.perard@citrix.com> | 2019-06-24 10:42:29 +0100 |
commit | 345f42b4be9f9975ff3f7f3e95acae4f67c74f89 (patch) | |
tree | e9c8d791310f56d9e36be4851d9b84a870d62375 /util/path.c | |
parent | 83361a8a1f932cfac8ae4a5b86e935ad6ab1c528 (diff) | |
download | qemu-345f42b4be9f9975ff3f7f3e95acae4f67c74f89.zip qemu-345f42b4be9f9975ff3f7f3e95acae4f67c74f89.tar.gz qemu-345f42b4be9f9975ff3f7f3e95acae4f67c74f89.tar.bz2 |
xen-bus / xen-block: add support for event channel polling
This patch introduces a poll callback for event channel fd-s and uses
this to invoke the channel callback function.
To properly support polling, it is necessary for the event channel callback
function to return a boolean saying whether it has done any useful work or
not. Thus xen_block_dataplane_event() is modified to directly invoke
xen_block_handle_requests() and the latter only returns true if it actually
processes any requests. This also means that the call to qemu_bh_schedule()
is moved into xen_block_complete_aio(), which is more intuitive since the
only reason for doing a deferred poll of the shared ring should be because
there were previously insufficient resources to fully complete a previous
poll.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Message-Id: <20190408151617.13025-4-paul.durrant@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Diffstat (limited to 'util/path.c')
0 files changed, 0 insertions, 0 deletions