Re: [PATCH 1/2] mmap.2: clarify MAP_LOCKED semantic

[Peter Zijlstra]

On 05/11/2016 01:07 PM, Peter Zijlstra wrote:
> On 05/13/2015 04:38 PM, Michal Hocko wrote:
> > This patch makes the semantic of MAP_LOCKED explicit and suggest using
> > mmap + mlock as the only way to guarantee no later major page faults.
>
> URGH, this really blows chunks. It basically means MAP_LOCKED is 
> pointless cruft and we might as well remove it.
>
> Why not fix it proper?

OK; after having been pointed at this discussion, it seems I reacted rather
too hasty in that I didn't read all the previous threads.

From that it appears fixing this proper is indeed rather hard, and we 
should
indeed consider MAP_LOCKED broken. At which point I would've worded the
manpage update stronger, but alas.

Sorry for the noise.