Messages in this thread | | | Subject | Re: [RFC 2/4] Deactivate mmap_sem assert | From | Laurent Dufour <> | Date | Wed, 19 Apr 2017 15:45:50 +0200 |
| |
On 19/04/2017 14:30, Peter Zijlstra wrote: > On Wed, Apr 19, 2017 at 02:18:25PM +0200, Laurent Dufour wrote: >> When mmap_sem will be moved to a range lock, some assertion done in >> the code are no more valid, like the one ensuring mmap_sem is held. >> > > Why are they no longer valid?
I didn't explain that very well..
When using a range lock we can't check that the lock is simply held, but if the range we are interesting on is locked or not.
As I mentioned this patch will have to be reverted / reviewed once the range lock is providing dedicated APIs, but some check might be difficult to adapt to a range.
| |