Re: [PATCH] mmap.2: describe the 5level paging hack

2019-02-25 Thread Michael Kerrisk (man-pages)
On 2/11/19 5:36 PM, Jann Horn wrote: > The manpage is missing information about the compatibility hack for > 5-level paging that went in in 4.14, around commit ee00f4a32a76 ("x86/mm: > Allow userspace have mappings above 47-bit"). Add some information about > that. > > While I don't think any hard

Re: clock_gettime.2: _COARSE clocks are not always faster...

2016-04-18 Thread Michael Kerrisk (man-pages)
On 04/18/2016 04:12 PM, Michael Kerrisk (man-pages) wrote: > Hello Rasmus, > > On 04/09/2016 05:50 PM, Rasmus Villemoes wrote: >> Hi Michael >> >> The other day, I was curious how the vdso was implemented on ppc, and I >> noted that neither ppc32 or ppc64 handle

Re: clock_gettime.2: _COARSE clocks are not always faster...

2016-04-18 Thread Michael Kerrisk (man-pages)
Hello Rasmus, On 04/09/2016 05:50 PM, Rasmus Villemoes wrote: > Hi Michael > > The other day, I was curious how the vdso was implemented on ppc, and I > noted that neither ppc32 or ppc64 handle the _COARSE versions of > CLOCK_{REALTIME,MONOTONIC} in the vdso, so they fall back to an actual > sysc