David Miller wrote: > From: Michal Simek <[email protected]> > Date: Wed, 08 Jul 2009 19:03:11 +0200 > > >> When I call mmap for that open file with pointer to calloc place >> (first parameter, + length zero) it should be one tlb invalidation >> for calloc and new tlb which connect open file. We check it and we >> don't have any tlb invalidation that's why I think that kernel do >> different thigs. Or is it there any copying? Or anything different? >> > > There is no need to tlb flush the calloc area unless that memory area > is actually touched by the user application and thus the page is > faulted in. > That calloc area is filled by any value (in that test). Is it mean that for this case when calloc area is touched there must be tlb invalidation + remapping?
Michal -- Michal Simek, Ing. (M.Eng) PetaLogix - Linux Solutions for a Reconfigurable World w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663 ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
