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
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 locked or not, and if we encountered a race it was quite a
pain narrowing i
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