On Mon, Nov 10, 2014 at 10:44:12AM +0100, Luigi Rizzo wrote:
> On Mon, Nov 10, 2014 at 10:34:57AM +0200, Konstantin Belousov wrote:
> > On Mon, Nov 10, 2014 at 02:49:39AM +0100, Luigi Rizzo wrote:
> > > It was noticed that there is huge dev_lock() contention when multiple
> > > processes do a poll(
On Mon, Nov 10, 2014 at 10:34:57AM +0200, Konstantin Belousov wrote:
> On Mon, Nov 10, 2014 at 02:49:39AM +0100, Luigi Rizzo wrote:
> > It was noticed that there is huge dev_lock() contention when multiple
> > processes do a poll() even on independent file descriptors.
> >
> > Turns out that not j
On Mon, Nov 10, 2014 at 02:49:39AM +0100, Luigi Rizzo wrote:
> It was noticed that there is huge dev_lock() contention when multiple
> processes do a poll() even on independent file descriptors.
>
> Turns out that not just poll but most syscalls on file descriptors
> (as opposed to sockets) in sys
It was noticed that there is huge dev_lock() contention when multiple
processes do a poll() even on independent file descriptors.
Turns out that not just poll but most syscalls on file descriptors
(as opposed to sockets) in sys/fs/devfs/devfs_vnops.c including
devfs_poll_f(), devfs_ioctl_f() and r
