Re: [PATCH 2/6] shm: add sealing API

Hi

On Sat, Apr 12, 2014 at 12:07 AM, Andy Lutomirski luto@amacapital.net wrote:

I bet this is missing from lots of places. For example, I can't find any write_access stuff in the rdma code.

I suspect that the VM_DENYWRITE code is just generally racy.

So what does S_IMMUTABLE do to prevent such races? I somehow suspect it's broken in that regard, too.

I really dislike pinning pages like this, but if people want to keep it I guess I have to scan all shmem-inode pages before changing seals.

Thanks David