On 2011-06-22 12:56, Gilles Chanteperdrix wrote: > On 06/22/2011 12:55 PM, Jan Kiszka wrote: >> 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. > > self-contained test case please.
Yes, will check this. Currently distracted again by a higher prio oops :-/. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux _______________________________________________ Xenomai-core mailing list [email protected] https://mail.gna.org/listinfo/xenomai-core
