Re: [PATCH v3 0/3] rseq: minor optimizations

2021-04-14 Thread Peter Zijlstra
On Tue, Apr 13, 2021 at 04:40:33PM -0400, Mathieu Desnoyers wrote: > - On Apr 13, 2021, at 4:33 PM, Eric Dumazet eric.duma...@gmail.com wrote: > > > From: Eric Dumazet > > > > rseq is a heavy user of copy to/from user data in fast paths. > > This series tries to reduce the cost. > > > >

Re: [PATCH v3 0/3] rseq: minor optimizations

2021-04-13 Thread Mathieu Desnoyers
- On Apr 13, 2021, at 4:33 PM, Eric Dumazet eric.duma...@gmail.com wrote: > From: Eric Dumazet > > rseq is a heavy user of copy to/from user data in fast paths. > This series tries to reduce the cost. > > v3: Third patch going back to v1 (only deal with 64bit arches) > v2: Addressed Peter

[PATCH v3 0/3] rseq: minor optimizations

2021-04-13 Thread Eric Dumazet
From: Eric Dumazet rseq is a heavy user of copy to/from user data in fast paths. This series tries to reduce the cost. v3: Third patch going back to v1 (only deal with 64bit arches) v2: Addressed Peter and Mathieu feedbacks, thanks ! Eric Dumazet (3): rseq: optimize rseq_update_cpu_id()