On 2011-06-22 12:36, Gilles Chanteperdrix wrote: > On 06/22/2011 11:26 AM, Jan Kiszka wrote: >> Hi Gilles, >> >> do you remember reasons for only pre-faulting the main thread's stack? >> The desire to avoid wasting resources by forcing all stacks into memory? >> >> I've the requirement on my table to provide a generic solution of all >> shadow threads. I think this should be possible using pthread_getattr_np >> and walking the stack page-wise, but I may miss some pitfall. > > Last time I checked, only the main thread stack was mapped on demand. > Other threads have mmaped stacks, which are made present by mlockall, > so, do not need faulting.
That's definitely not the case in general. Customer has just confirmed that pre-faulting thread stacks avoids first-access domain switches. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux _______________________________________________ Xenomai-core mailing list Xenomaiemail@example.com https://mail.gna.org/listinfo/xenomai-core