Re: [PATCH v4 09/66] mm/mmap: Use the maple tree in find_vma() instead of the rbtree.

[Vlastimil Babka]

On 12/15/21 19:09, Liam Howlett wrote:
>> - the future lookup of address vma->vm_end will return this vma, although
>> the address doesn't belong to it. Wouldn't be surprised if this caused
>> infrequent mysterious bugs?
>>
>> Both will resolve with vmacache removal later, but better still fix this.
> This is certainly worth fixing.  I am surprised that I did not hit a
> random bug as you said above, I would expect it to occur as well.
> Although, I didn't run each patch individually for long unless I was
> tracking down an issue on a rebase.

Ah, it doesn't cause a bug because vmacache_find() checks the boundaries of
vmas in the vmacache.