This triggers two problems:
- lockdep complains about deadlock since we try to lock another page while
one is already
locked. I can clear that by allowing page locks to nest within each other, but
that seems
wrong and we'll miss actual deadlock cases.
Right,.. I think we can cobble somethin
On Tue, Dec 31, 2013 at 11:42:04AM -0500, Sasha Levin wrote:
> On 12/31/2013 11:26 AM, Peter Zijlstra wrote:
> >On Mon, Dec 30, 2013 at 10:22:02PM -0500, Sasha Levin wrote:
> >
> >>I really want to use lockdep here, but I'm not really sure how to handle
> >>locks which live
> >>for a rather long w
On 12/31/2013 11:26 AM, Peter Zijlstra wrote:
On Mon, Dec 30, 2013 at 10:22:02PM -0500, Sasha Levin wrote:
I really want to use lockdep here, but I'm not really sure how to handle locks
which live
for a rather long while instead of being locked and unlocked in the same
function like
most of t
On Mon, Dec 30, 2013 at 10:22:02PM -0500, Sasha Levin wrote:
> I really want to use lockdep here, but I'm not really sure how to handle
> locks which live
> for a rather long while instead of being locked and unlocked in the same
> function like
> most of the rest of the kernel. (Cc Ingo, PeterZ
On 12/30/2013 05:48 PM, Kirill A. Shutemov wrote:
On Mon, Dec 30, 2013 at 11:33:47AM -0500, Sasha Levin wrote:
On 12/30/2013 06:43 AM, Kirill A. Shutemov wrote:
On Sat, Dec 28, 2013 at 08:45:03PM -0500, Sasha Levin wrote:
We've recently stumbled on several issues with the page lock which
trigg
On Mon, Dec 30, 2013 at 11:33:47AM -0500, Sasha Levin wrote:
> On 12/30/2013 06:43 AM, Kirill A. Shutemov wrote:
> >On Sat, Dec 28, 2013 at 08:45:03PM -0500, Sasha Levin wrote:
> >>We've recently stumbled on several issues with the page lock which
> >>triggered BUG_ON()s.
> >>
> >>While working on
On 12/30/2013 06:43 AM, Kirill A. Shutemov wrote:
On Sat, Dec 28, 2013 at 08:45:03PM -0500, Sasha Levin wrote:
We've recently stumbled on several issues with the page lock which
triggered BUG_ON()s.
While working on them, it was clear that due to the complexity of
locking its pretty hard to fig
On Sat, Dec 28, 2013 at 08:45:03PM -0500, Sasha Levin wrote:
> We've recently stumbled on several issues with the page lock which
> triggered BUG_ON()s.
>
> While working on them, it was clear that due to the complexity of
> locking its pretty hard to figure out if something is supposed
> to be lo
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