On Thu 07-02-13 13:43:42, Dave Chinner wrote:
> On Wed, Feb 06, 2013 at 08:25:34PM +0100, Jan Kara wrote:
> > On Wed 06-02-13 10:25:12, Dave Chinner wrote:
> > > On Mon, Feb 04, 2013 at 01:38:31PM +0100, Jan Kara wrote:
> > > > On Thu 31-01-13 16:07:57, Andrew Morton wrote:
> > > > > > c) i_mutex d
On Wed, Feb 06, 2013 at 08:25:34PM +0100, Jan Kara wrote:
> On Wed 06-02-13 10:25:12, Dave Chinner wrote:
> > On Mon, Feb 04, 2013 at 01:38:31PM +0100, Jan Kara wrote:
> > > On Thu 31-01-13 16:07:57, Andrew Morton wrote:
> > > > > c) i_mutex doesn't allow any paralellism of operations using it and
On Wed 06-02-13 10:25:12, Dave Chinner wrote:
> On Mon, Feb 04, 2013 at 01:38:31PM +0100, Jan Kara wrote:
> > On Thu 31-01-13 16:07:57, Andrew Morton wrote:
> > > > c) i_mutex doesn't allow any paralellism of operations using it and some
> > > >filesystems workaround this for specific cases (e.
On Mon, Feb 04, 2013 at 01:38:31PM +0100, Jan Kara wrote:
> On Thu 31-01-13 16:07:57, Andrew Morton wrote:
> > > c) i_mutex doesn't allow any paralellism of operations using it and some
> > >filesystems workaround this for specific cases (e.g. DIO reads). Using
> > >range locking allows for
On Thu 31-01-13 16:07:57, Andrew Morton wrote:
> On Thu, 31 Jan 2013 22:49:48 +0100
> Jan Kara wrote:
>
> > There are several different motivations for implementing mapping range
> > locking:
> >
> > a) Punch hole is currently racy wrt mmap (page can be faulted in in the
> >punched range aft
On Thu, Jan 31, 2013 at 04:07:57PM -0800, Andrew Morton wrote:
[snip]
> > c) i_mutex doesn't allow any paralellism of operations using it and some
> >filesystems workaround this for specific cases (e.g. DIO reads). Using
> >range locking allows for concurrent operations (e.g. writes, DIO) o
On Thu, 31 Jan 2013 22:49:48 +0100
Jan Kara wrote:
> There are several different motivations for implementing mapping range
> locking:
>
> a) Punch hole is currently racy wrt mmap (page can be faulted in in the
>punched range after page cache has been invalidated) leading to nasty
>resul
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