[PATCH 1/3] mmap: Fix vma_iterator in error path of vma_merge()
Andrew Morton
akpm at linux-foundation.org
Wed Sep 27 10:14:10 PDT 2023
On Wed, 27 Sep 2023 12:07:44 -0400 "Liam R. Howlett" <Liam.Howlett at oracle.com> wrote:
> When merging of the previous VMA fails after the vma iterator has been
> moved to the previous entry, the vma iterator must be advanced to ensure
> the caller takes the correct action on the next vma iterator event. Fix
> this by adding a vma_next() call to the error path.
>
> Users may experience higher CPU usage, most likely in very low memory
> situations.
Looking through this thread:
> Closes: https://lore.kernel.org/linux-mm/CAG48ez12VN1JAOtTNMY+Y2YnsU45yL5giS-Qn=ejtiHpgJAbdQ@mail.gmail.com/
I'm seeing no indication that the effect is CPU consumption? Jann is
excpecting bogus oom-killing?
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