Re: 2.4 vm, program load, page faulting, ...

From: Alex Tomas (bzzz@tmi.comex.ru)
Date: Mon Mar 17 2003 - 11:50:04 EST

>>>>> 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.

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