From: "H. Peter Anvin" <hpa@zytor.com>
To: Jamie Lokier <jamie@shareable.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i386 uaccess to fixmap pages
Date: Sat, 10 May 2003 12:23:50 -0700 [thread overview]
Message-ID: <3EBD51C6.8030100@zytor.com> (raw)
In-Reply-To: <20030510153156.GA29271@mail.jlokier.co.uk>
Jamie Lokier wrote:
>
> It doesn't need a PTE. The vsyscall code could be _copied_ to the end
> of the page at 0xbffff000, with the stack immediately preceding it.
>
You don't really want that, though. If you're doing gettimeofday() in
user space it's critically important that the kernel can modify all
these pages at once.
-hpa
next prev parent reply other threads:[~2003-05-10 19:11 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-09 2:03 [PATCH] i386 uaccess to fixmap pages Roland McGrath
2003-05-09 4:31 ` Andrew Morton
2003-05-09 8:55 ` Roland McGrath
2003-05-09 9:19 ` Andrew Morton
2003-05-09 9:40 ` Roland McGrath
2003-05-09 10:43 ` Roland McGrath
2003-05-09 11:42 ` Dave Jones
2003-05-09 11:55 ` Alan Cox
2003-05-09 12:40 ` Jamie Lokier
2003-05-09 16:06 ` Linus Torvalds
2003-05-09 16:38 ` Dave Hansen
2003-05-09 15:55 ` Martin J. Bligh
2003-05-09 18:20 ` William Lee Irwin III
2003-05-09 16:48 ` Linus Torvalds
2003-05-09 17:16 ` Dave Hansen
2003-05-10 3:26 ` H. Peter Anvin
2003-05-10 15:31 ` Jamie Lokier
2003-05-10 17:23 ` Ulrich Drepper
2003-05-10 19:23 ` H. Peter Anvin [this message]
2003-05-10 20:52 ` Jamie Lokier
-- strict thread matches above, loose matches on Subject: below --
2003-05-09 17:28 Chuck Ebbert
2003-05-09 17:49 ` Linus Torvalds
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