Re: [PATCH v4 4/5] cramfs: add mmap support
From: Nicolas Pitre
Date: Sun Oct 01 2017 - 18:29:33 EST
On Sun, 1 Oct 2017, Christoph Hellwig wrote:
> up_read(&mm->mmap_sem) in the fault path is a still a complete
Care to elaborate?
What about mm/filemap.c:__lock_page_or_retry() then?
Why the special handling on mm->mmap_sem with VM_FAULT_RETRY?
What are the potential problems with my approach I didn't cover yet?
Serious: I'm simply looking for solutions here.