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Groups > linux.kernel > #1398958
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 1/2] mmap.2: clarify MAP_LOCKED semantic |
| Date | 2016-05-11 13:20 +0200 |
| Message-ID | <rxAlk-7bN-21@gated-at.bofh.it> (permalink) |
| References | <ppFZg-2HO-21@gated-at.bofh.it> <ppFZg-2HO-19@gated-at.bofh.it> <rxAbD-77O-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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.
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Re: [PATCH 1/2] mmap.2: clarify MAP_LOCKED semantic Peter Zijlstra <peterz@infradead.org> - 2016-05-11 13:10 +0200 Re: [PATCH 1/2] mmap.2: clarify MAP_LOCKED semantic Peter Zijlstra <peterz@infradead.org> - 2016-05-11 13:20 +0200 Re: [PATCH 1/2] mmap.2: clarify MAP_LOCKED semantic Michal Hocko <mhocko@kernel.org> - 2016-05-11 13:40 +0200
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