From: Randolph Chung <tausq@debian.org>
To: "David S. Miller" <davem@redhat.com>
Cc: willy@debian.org, grundler@dsl2.external.hp.com,
jsm@udlkern.fc.hp.com, parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Re: RFC: mmap patch
Date: Sat, 8 Mar 2003 15:31:41 -0800 [thread overview]
Message-ID: <20030308233141.GC11363@tausq.org> (raw)
In-Reply-To: <20030308.150023.97153009.davem@redhat.com>
> You need merely 9MB of address space (2 * 4MB) if you implement
> my {copy,clear}_user_page() dynamic mapping hack, that will be
> tons more cheaper than any kmap based scheme and also be nicer
> on the TLB as there will be zero TLB changes occurring around
> the copy/clear.
i hope i'm not missing something obvious, but from what i understand
from this discussion, {copy,user}_user_page helps with the initial
syncing up of new mappings that are created for a process... but how
does this deal with syncing up changes afterwards? for that we still
need the flush_dcache_page to walk the user mappings right?
randolph
--
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/
next prev parent reply other threads:[~2003-03-08 23:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-06 14:14 [parisc-linux] Re: RFC: mmap patch John Marvin
2003-03-06 14:31 ` Matthew Wilcox
2003-03-06 15:31 ` Randolph Chung
2003-03-08 6:30 ` Grant Grundler
2003-03-08 6:29 ` David S. Miller
2003-03-08 17:24 ` Grant Grundler
2003-03-08 19:04 ` David S. Miller
2003-03-08 20:42 ` Grant Grundler
2003-03-08 22:45 ` Matthew Wilcox
2003-03-08 23:00 ` David S. Miller
2003-03-08 23:27 ` Matthew Wilcox
2003-03-08 23:14 ` David S. Miller
2003-03-08 23:31 ` Randolph Chung [this message]
2003-03-08 23:15 ` David S. Miller
2003-03-09 2:15 ` Grant Grundler
2003-03-08 23:11 ` Matthew Wilcox
2003-03-08 23:02 ` David S. Miller
2003-03-09 14:42 ` Matthew Wilcox
2003-03-09 21:38 ` David S. Miller
2003-03-10 1:50 ` Matthew Wilcox
2003-03-10 5:18 ` David S. Miller
2003-03-14 13:04 ` Jochen Friedrich
2003-03-14 16:23 ` Grant Grundler
-- strict thread matches above, loose matches on Subject: below --
2003-03-09 3:42 John Marvin
2003-03-09 21:29 ` David S. Miller
2003-03-09 3:51 John Marvin
2003-03-09 21:31 ` David S. Miller
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