On Thu, 2007-09-13 at 04:37 -0400, Mike Frysinger wrote: > On 9/13/07, Matthew Wilcox <[EMAIL PROTECTED]> wrote: > > On Thu, Sep 13, 2007 at 03:56:43PM +0800, Bryan Wu wrote: > > > +/* Not relevant on no-mmu */ > > > > I thought this list seemed a little long, so I investigated a couple > > of them. mbind makes sense (it's only implemented for NUMA ... a NUMA > > embedded platform? not the kind which runs applications that use mbind), > > sorry, i dont quite follow ... you're saying it does or doesnt make > sense to have NUMA syscalls on a no-mmu platform ? my [limited] > understanding of NUMA is that it, by definition, requires a MMU in > order to shunt pages around >
I think Matt means mbind can be ignored because it is for NUMA. > > but mremap doesn't -- there's even an implementation in mm/nommu.c. > > Could you check the rest of these over to see if they truly don't need > > to be implemented for no-mmu? > > you're right we want mremap, my fault > Yes, I do think so, both sys_mremap and sys_munmap are implemented in mm/nommu.c. How do think of this, Bernd? > > I think you'll want the *robust_list syscalls too. > > lack of man pages on these made be lazy and dump em into the mmu pile > when in reality they have nothing to do with it ... we do want these > No man pages for this fancy syscalls. I found some info here: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e9056f13bfcdd054a0c3d730e4e096748d8a363a I am not sure for these. Need some investigation. > > > +#define __IGNORE_swapon > > > +#define __IGNORE_swapoff > > a no brainer -- not usable on no-mmu > > > > +#define __IGNORE_msync > > > +#define __IGNORE_remap_file_pages > > > +#define __IGNORE_mlock > > > +#define __IGNORE_munlock > > > +#define __IGNORE_mlockall > > > +#define __IGNORE_munlockall > > > +#define __IGNORE_mincore > > > +#define __IGNORE_madvise > > implementation only exists for mmu > > > > +#define __IGNORE_mbind > > > +#define __IGNORE_get_mempolicy > > > +#define __IGNORE_set_mempolicy > > > +#define __IGNORE_migrate_pages > > > +#define __IGNORE_move_pages > > NUMA only > > > > +#define __IGNORE_mremap > > > +#define __IGNORE_set_robust_list > > > +#define __IGNORE_get_robust_list > > we want these > > > > +#define __IGNORE_getcpu > > useful only with SMP so i guess we should do it also the brand new syscall fallocate should be added as Paul said: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=97ac73506c0ba93f30239bb57b4cfc5d73e68a62 Thanks a lot -Bryan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
