On Thu, 10 Nov 2005, Michael S. Tsirkin wrote:
> Quoting Gleb Natapov <[email protected]>:
> > On Thu, Nov 10, 2005 at 02:48:53PM +0200, Michael S. Tsirkin wrote:
> > > > Also perhapse we should skip VM_SHARED VMAs?
> > >
> > > Why?
> > >
> > They will work correctly across fork().
>
> So why would I call madvise on such a VMA?
To avoid the overhead of forking it e.g. if it's a large nonlinear vma,
a lot of time may be wasted on copying its ptes for fork. That's one
of the reasons I came to like your DONTCOPY.
So, it may not be useful for your particular RDMA issue, but I see no
reason to exclude VM_SHARED vmas from the madvise, and good reason to
include them.
Hugh
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
