Messages in this thread | | | Date | Sun, 1 Oct 2017 18:29:22 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH v4 4/5] cramfs: add mmap support |
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On Sun, 1 Oct 2017, Christoph Hellwig wrote:
> up_read(&mm->mmap_sem) in the fault path is a still a complete > no-go, > > NAK
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.
Nicolas
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