Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Fri, Feb 17, 2023 at 08:10:35AM -0800, Suren Baghdasaryan wrote: > On Fri, Feb 17, 2023 at 8:05 AM Matthew Wilcox wrote: > > > > On Thu, Feb 16, 2023 at 06:14:59PM -0800, Suren Baghdasaryan wrote: > > > On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan > > > wrote: > > > > > > > > On Thu, F

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Fri, Feb 17, 2023 at 08:13:01AM -0800, Suren Baghdasaryan wrote: > On Fri, Feb 17, 2023 at 2:21 AM Hyeonggon Yoo <42.hye...@gmail.com> wrote: > > > > On Fri, Feb 17, 2023 at 11:15 AM Suren Baghdasaryan > > wrote: > > > > > > On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan > > > wrote: >

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Fri, Feb 17, 2023 at 2:21 AM Hyeonggon Yoo <42.hye...@gmail.com> wrote: > > On Fri, Feb 17, 2023 at 11:15 AM Suren Baghdasaryan wrote: > > > > On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan > > wrote: > > > > > > On Thu, Feb 16, 2023 at 7:44 AM Matthew Wilcox > > > wrote: > > > > > > >

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Fri, Feb 17, 2023 at 8:05 AM Matthew Wilcox wrote: > > On Thu, Feb 16, 2023 at 06:14:59PM -0800, Suren Baghdasaryan wrote: > > On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan > > wrote: > > > > > > On Thu, Feb 16, 2023 at 7:44 AM Matthew Wilcox > > > wrote: > > > > > > > > On Wed, Feb 1

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Thu, Feb 16, 2023 at 06:14:59PM -0800, Suren Baghdasaryan wrote: > On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan wrote: > > > > On Thu, Feb 16, 2023 at 7:44 AM Matthew Wilcox wrote: > > > > > > On Wed, Feb 15, 2023 at 09:17:41PM -0800, Suren Baghdasaryan wrote: > > > > When vma->anon_vma

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Fri, Feb 17, 2023 at 11:15 AM Suren Baghdasaryan wrote: > > On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan wrote: > > > > On Thu, Feb 16, 2023 at 7:44 AM Matthew Wilcox wrote: > > > > > > On Wed, Feb 15, 2023 at 09:17:41PM -0800, Suren Baghdasaryan wrote: > > > > When vma->anon_vma is no

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Thu, Feb 16, 2023 at 11:43 AM Suren Baghdasaryan wrote: > > On Thu, Feb 16, 2023 at 7:44 AM Matthew Wilcox wrote: > > > > On Wed, Feb 15, 2023 at 09:17:41PM -0800, Suren Baghdasaryan wrote: > > > When vma->anon_vma is not set, page fault handler will set it by either > > > reusing anon_vma of

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Thu, Feb 16, 2023 at 7:44 AM Matthew Wilcox wrote: > > On Wed, Feb 15, 2023 at 09:17:41PM -0800, Suren Baghdasaryan wrote: > > When vma->anon_vma is not set, page fault handler will set it by either > > reusing anon_vma of an adjacent VMA if VMAs are compatible or by > > allocating a new one. f

Re: [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

On Wed, Feb 15, 2023 at 09:17:41PM -0800, Suren Baghdasaryan wrote: > When vma->anon_vma is not set, page fault handler will set it by either > reusing anon_vma of an adjacent VMA if VMAs are compatible or by > allocating a new one. find_mergeable_anon_vma() walks VMA tree to find > a compatible ad

[PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set

When vma->anon_vma is not set, page fault handler will set it by either reusing anon_vma of an adjacent VMA if VMAs are compatible or by allocating a new one. find_mergeable_anon_vma() walks VMA tree to find a compatible adjacent VMA and that requires not only the faulting VMA to be stable but also