| Message ID | 1499291458-30231-15-git-send-email-sstabellini@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 05/07/17 23:50, Stefano Stabellini wrote: > We have one ioworker per socket. Each ioworker goes through the list of > outstanding read/write requests. Once all requests have been dealt with, > it returns. > > We use one atomic counter per socket for "read" operations and one > for "write" operations to keep track of the reads/writes to do. > > We also use one atomic counter ("io") per ioworker to keep track of how > many outstanding requests we have in total assigned to the ioworker. The > ioworker finishes when there are none. > > Signed-off-by: Stefano Stabellini <stefano@aporeto.com> > Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> Thanks, Juergen
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c index 214356c..a5f11d5 100644 --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -96,8 +96,34 @@ static int pvcalls_back_release_active(struct xenbus_device *dev, struct pvcalls_fedata *fedata, struct sock_mapping *map); +static void pvcalls_conn_back_read(void *opaque) +{ +} + +static void pvcalls_conn_back_write(struct sock_mapping *map) +{ +} + static void pvcalls_back_ioworker(struct work_struct *work) { + struct pvcalls_ioworker *ioworker = container_of(work, + struct pvcalls_ioworker, register_work); + struct sock_mapping *map = container_of(ioworker, struct sock_mapping, + ioworker); + + while (atomic_read(&map->io) > 0) { + if (atomic_read(&map->release) > 0) { + atomic_set(&map->release, 0); + return; + } + + if (atomic_read(&map->read) > 0) + pvcalls_conn_back_read(map); + if (atomic_read(&map->write) > 0) + pvcalls_conn_back_write(map); + + atomic_dec(&map->io); + } } static int pvcalls_back_socket(struct xenbus_device *dev,
We have one ioworker per socket. Each ioworker goes through the list of outstanding read/write requests. Once all requests have been dealt with, it returns. We use one atomic counter per socket for "read" operations and one for "write" operations to keep track of the reads/writes to do. We also use one atomic counter ("io") per ioworker to keep track of how many outstanding requests we have in total assigned to the ioworker. The ioworker finishes when there are none. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com --- drivers/xen/pvcalls-back.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)