Hi Chris, 2016-08-29 Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>: > If we being polled with a timeout of zero, a nonblocking busy query, > we don't need to install any fence callbacks as we will not be waiting. > As we only install the callback once, the overhead comes from the atomic > bit test that also causes serialisation between threads. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx> > Cc: Gustavo Padovan <gustavo@xxxxxxxxxxx> > Cc: linux-media@xxxxxxxxxxxxxxx > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx > Cc: linaro-mm-sig@xxxxxxxxxxxxxxxx > --- > drivers/dma-buf/sync_file.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Indeed, we can shortcut this. Reviewed-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx> Gustavo -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
