On Tue, 12 Nov 2024, Suren Baghdasaryan wrote: > > Thinking about this some more, I don't think this works. I'm relying > on vma_start_read() to stabilize the vma, however the lock I'm taking > is part of the vma which can be reused from under us. So, the lock I'm > taking might be reinitialized after I take the lock... > I need to figure out a way to stabilize the vma in some other manner > before taking this lock. (I'm not paying attention and following the patches, I just happened to notice this remark: forgive me if I'm out of context and have misunderstood, but hope this might help:) But this is exactly the problem SLAB_TYPESAFE_BY_RCU was invented for. You just have to be careful that the locks are initialized only when the slab is first created (allocated from buddy), not reinitialized whenever a new object is allocated from that slab. Hugh
