On Wed, Jun 13, 2018 at 7:46 AM Jan Kara <jack@xxxxxxx> wrote:
>
> On Wed 13-06-18 19:43:47, Tetsuo Handa wrote:
> > Can't we utilize RCU grace period (like shown below) ?
>
> Honestly, the variant 1 looks too ugly to me. However variant 2 looks
> mostly OK.
The versions that don't have that conditional locking look fine to me, yes.
> Also I'd avoid the addition argument to wb_writeback() and split the function instead. The
> patch resulting from your and mine ideas is attached. Thoughts?
Is there a reason for this model:
+ if (cgwb_start_shutdown(wb))
+ __wb_shutdown(wb);
when there is just one call site of this? Why not just make the
function void, and make it do that __wb_shutdown() itself in the true
case?
IOW, just make it be
+ cgwb_shutdown(wb);
instead?
That's what "wb_shutdown()" does - it does the "wb_start_shutdown()"
test internally, and does __wb_shutdown() all inside itself, instead
of expecting the caller to do it.
I dunno.
Linus
Linus
