On Mon, Mar 17, 2003 at 06:12:46PM +0100, wind-lkml@cocodriloo.com wrote:
> On Mon, Mar 17, 2003 at 07:50:04PM +0300, Alex Tomas wrote:
> > >>>>> wind (w) writes:
> >
> > w> On Mon, Mar 17, 2003 at 11:01:31AM -0500, Rik van Riel wrote:
> > >> On Mon, 17 Mar 2003, William Lee Irwin III wrote:
> > >> > On Sat, 15 Mar 2003, Paul Albrecht wrote:
> > >> > >> ... Why does the kernel page fault on text pages, present in
> > >> the page > >> cache, when a program starts? Couldn't the pte's for
> > >> text present in the > >> page cache be resolved when they're
> > >> mapped to memory?
> > >> >
> >
> > w> You should ask Andrew about his patch to do exactly that: he
> > w> forced all PROC_EXEC mmaps to be nonlinear-mapped and this forced
> > w> all programs to suck entire binaries into memory... I recall he
> > w> saw at least 25% improvement at launching gnome.
> >
> > they talked about pages _already present_ in pagecache.
>
> I wonder if this could be done by walking and faulting
> all pages at fs/binfmt_elf.c::elf_map just after do_mmap...
> will try it just now :)
OK, this is not tested, since I'm compiling it now... feel free
to correct :)
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