On 5/17/23 11:09, Eelco Chaudron wrote:
This patch adds an operation callback which gets called every time the library wants to call eventfd_write(). This eventfd_write() call could result in a system call, which could potentially block the PMD thread. The callback function can decide whether it's ok to handle the eventfd_write() now or have the newly introduced function, rte_vhost_notify_guest(), called at a later time. This can be used by 3rd party applications, like OVS, to avoid system calls being called as part of the PMD threads. Signed-off-by: Eelco Chaudron <echau...@redhat.com> --- lib/vhost/meson.build | 2 ++ lib/vhost/rte_vhost.h | 23 +++++++++++++++++- lib/vhost/socket.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++--- lib/vhost/version.map | 9 +++++++ lib/vhost/vhost.c | 38 ++++++++++++++++++++++++++++++ lib/vhost/vhost.h | 58 ++++++++++++++++++++++++++++++++------------- 6 files changed, 171 insertions(+), 22 deletions(-)
The patch looks good to me, but that's the first time we use function versioning in Vhost library, so I'd like another pair of eyes to be sure I don't miss anything. Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com> Thomas, do we need to mention it somewhere in the release note? Thanks, Maxime
