Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 17 Mar 2003 18:12:46 +0100 | From | wind-lkml@cocodril ... | Subject | Re: 2.4 vm, program load, page faulting, ... |
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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 :) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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