Re: [PATCH v3 hmm 02/11] mm/mmu_notifiers: do not speculatively allocate a mmu_notifier_mm

On 8/6/19 4:15 PM, Jason Gunthorpe wrote: From: Jason Gunthorpe A prior commit e0f3c3f78da2 ("mm/mmu_notifier: init notifier if necessary") made an attempt at doing this, but had to be reverted as calling the GFP_KERNEL allocator under the i_mmap_mutex causes deadlock, see commit 35cfa2b0b491

[PATCH v3 hmm 02/11] mm/mmu_notifiers: do not speculatively allocate a mmu_notifier_mm

From: Jason Gunthorpe A prior commit e0f3c3f78da2 ("mm/mmu_notifier: init notifier if necessary") made an attempt at doing this, but had to be reverted as calling the GFP_KERNEL allocator under the i_mmap_mutex causes deadlock, see commit 35cfa2b0b491 ("mm/mmu_notifier: allocate mmu_notifier in