| Date | Mon, 20 Apr 2020 12:33:10 -0700 | From | Matthew Wilcox <> | Subject | Re: [PATCH v4 06/10] mmap locking API: convert nested write lock sites |
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On Tue, Apr 14, 2020 at 05:43:49PM -0700, Michel Lespinasse wrote: > @@ -47,7 +48,7 @@ static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) > * when the new ->mm is used for the first time. > */ > __switch_mm(&new->context.id); > - down_write_nested(&new->mmap_sem, 1); > + mmap_write_lock_nested(new, 1);
This should have already been using SINGLE_DEPTH_NESTING. 1 is uninformative.
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