On Thu, 2009-03-26 at 17:43 -0700, Jesse Barnes wrote:
> On Wed, 25 Mar 2009 14:45:05 -0700
> Eric Anholt wrote:
>
> > Since the pagefault path determines that the lock order we use has to
> > be mmap_sem -> struct_mutex, we can't allow page faults to occur
> > while the struct_mutex is held. To
On Sat, Mar 28, 2009 at 12:35 PM, Jesse Barnes wrote:
> On Sat, 28 Mar 2009 01:54:32 +0100
> Peter Zijlstra wrote:
>
>> On Thu, 2009-03-26 at 17:43 -0700, Jesse Barnes wrote:
>> > On Wed, 25 Mar 2009 14:45:05 -0700
>> > Eric Anholt wrote:
>> >
>> > > Since the pagefault path determines that the
On Sat, 28 Mar 2009 01:54:32 +0100
Peter Zijlstra wrote:
> On Thu, 2009-03-26 at 17:43 -0700, Jesse Barnes wrote:
> > On Wed, 25 Mar 2009 14:45:05 -0700
> > Eric Anholt wrote:
> >
> > > Since the pagefault path determines that the lock order we use
> > > has to be mmap_sem -> struct_mutex, we c
On Fri, 27 Mar 2009 09:56:03 -0700
Eric Anholt wrote:
> On Thu, 2009-03-26 at 17:43 -0700, Jesse Barnes wrote:
> > On Wed, 25 Mar 2009 14:45:05 -0700
> > Eric Anholt wrote:
> >
> > > Since the pagefault path determines that the lock order we use
> > > has to be mmap_sem -> struct_mutex, we can'
On Thu, 2009-03-26 at 17:43 -0700, Jesse Barnes wrote:
> On Wed, 25 Mar 2009 14:45:05 -0700
> Eric Anholt wrote:
>
> > Since the pagefault path determines that the lock order we use has to
> > be mmap_sem -> struct_mutex, we can't allow page faults to occur
> > while the struct_mutex is held. To
On Wed, 25 Mar 2009 14:45:05 -0700
Eric Anholt wrote:
> Since the pagefault path determines that the lock order we use has to
> be mmap_sem -> struct_mutex, we can't allow page faults to occur
> while the struct_mutex is held. To fix this in pwrite, we first try
> optimistically to see if we can
Since the pagefault path determines that the lock order we use has to be
mmap_sem -> struct_mutex, we can't allow page faults to occur while the
struct_mutex is held. To fix this in pwrite, we first try optimistically to
see if we can copy from user without faulting. If it fails, fall back to
usi