On Thu, Jan 26, 2023 at 7:09 AM Matthew Wilcox wrote:
>
> On Thu, Jan 26, 2023 at 04:50:59PM +0200, Mike Rapoport wrote:
> > On Thu, Jan 26, 2023 at 11:17:09AM +0200, Mike Rapoport wrote:
> > > On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> > > > +/* Use when VMA is not part
On Thu, Jan 26, 2023 at 11:17:09AM +0200, Mike Rapoport wrote:
> On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> > vm_flags are among VMA attributes which affect decisions like VMA merging
> > and splitting. Therefore all vm_flags modifications are performed after
> > taking e
On Thu, Jan 26, 2023 at 04:50:59PM +0200, Mike Rapoport wrote:
> On Thu, Jan 26, 2023 at 11:17:09AM +0200, Mike Rapoport wrote:
> > On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> > > +/* Use when VMA is not part of the VMA tree and needs no locking */
> > > +static inline voi
On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> vm_flags are among VMA attributes which affect decisions like VMA merging
> and splitting. Therefore all vm_flags modifications are performed after
> taking exclusive mmap_lock to prevent vm_flags updates racing with such
> opera
On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> index 2d6d790d9bed..6c7c70bf50dd 100644
> --- a/include/linux/mm_types.h
> +++ b/include/linux/mm_types.h
> @@ -491,7 +491,13 @@ struct vm_area_struct {
>
On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> +/* Use when VMA is not part of the VMA tree and needs no locking */
> +static inline void init_vm_flags(struct vm_area_struct *vma,
> + unsigned long flags)
> +{
> + vma->vm_flags = flags;
vm_fl
On Wed, Jan 25, 2023 at 10:37 AM Matthew Wilcox wrote:
>
> On Wed, Jan 25, 2023 at 08:49:50AM -0800, Suren Baghdasaryan wrote:
> > On Wed, Jan 25, 2023 at 1:10 AM Peter Zijlstra wrote:
> > > > + /*
> > > > + * Flags, see mm.h.
> > > > + * WARNING! Do not modify directly.
> > > > +
On Wed, Jan 25, 2023 at 10:33 AM Matthew Wilcox wrote:
>
> On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> > +/* Use when VMA is not part of the VMA tree and needs no locking */
> > +static inline void init_vm_flags(struct vm_area_struct *vma,
> > +
vm_flags are among VMA attributes which affect decisions like VMA merging
and splitting. Therefore all vm_flags modifications are performed after
taking exclusive mmap_lock to prevent vm_flags updates racing with such
operations. Introduce modifier functions for vm_flags to be used whenever
flags a
On Wed, Jan 25, 2023 at 1:10 AM Peter Zijlstra wrote:
>
> On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
>
> > diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> > index 2d6d790d9bed..6c7c70bf50dd 100644
> > --- a/include/linux/mm_types.h
> > +++ b/include/linu
On Wed, Jan 25, 2023 at 08:49:50AM -0800, Suren Baghdasaryan wrote:
> On Wed, Jan 25, 2023 at 1:10 AM Peter Zijlstra wrote:
> > > + /*
> > > + * Flags, see mm.h.
> > > + * WARNING! Do not modify directly.
> > > + * Use {init|reset|set|clear|mod}_vm_flags() functions instead.
> >
On Wed 25-01-23 00:38:46, Suren Baghdasaryan wrote:
> vm_flags are among VMA attributes which affect decisions like VMA merging
> and splitting. Therefore all vm_flags modifications are performed after
> taking exclusive mmap_lock to prevent vm_flags updates racing with such
> operations. Introduce
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