Return the correct value for sysconf(_SC_PAGESIZE)
Wed Nov 16 14:01:00 GMT 2016
On 11/16/2016 07:56 AM, Erik Bray wrote:
>> There is no good reason to use the non-POSIXy page size. It doesn't
>> help you in the least for any pagesize-related functionality. Mmap
>> as well as malloc and friends only work with _SC_PAGESIZE sized pages.
>> It sounds as if you're looking for a solution for which there's no
> FWIW the background here is that I'm working on porting psutil  to
> Cygwin, and trying to accomplish as much as *possible* through the
> POSIX interfaces without having to fall back on the Windows API. It's
> actually a great exercise in what is and isn't possible with Cygwin :)
> In this case I was trying to compute process memory usage from
> /proc/<pid>/statm which gives values in page counts, so I need the
> page size (the actual page size) to compute the values in bytes.
If /proc/<pid>/statm is reporting memory in multiples that are not the
POSIX _SC_PAGESIZE, that is a bug in the statm file emulation that
should be fixed there.
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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