From: Randolph Chung <tausq@debian.org>
To: James Bottomley <James.Bottomley@steeleye.com>
Cc: Hugh Dickins <hugh@veritas.com>,
"David S. Miller" <davem@redhat.com>,
willy@debian.org, Linux Kernel <linux-kernel@vger.kernel.org>,
PARISC list <parisc-linux@lists.parisc-linux.org>,
drepper@redhat.com
Subject: Re: [parisc-linux] Re: Problems with kernel mmap (failing tst-mmap-eofsync in glibc on parisc)
Date: Fri, 22 Aug 2003 12:09:52 -0700 [thread overview]
Message-ID: <20030822190952.GF21328@tausq.org> (raw)
In-Reply-To: <1061577688.2090.285.camel@mulgrave>
In reference to a message from James Bottomley, dated Aug 22:
> On Fri, 2003-08-22 at 13:34, Hugh Dickins wrote:
> > Might the problem be in parisc's __flush_dcache_page,
> > which only examines i_mmap_shared?
>
> This is the issue: we do treat them differently.
as does some other archs, like ARM.
are we saying that MAP_SHARED != VM_SHARED? the mmap code allows
architectures to map pages differently if MAP_SHARED is specified, but
it puts it on i_mmap vs i_mmap_shared using VM_SHARED, and for read-only
files we silently drop VM_SHARED... so the page is mapped using
MAP_SHARED semantics but placed on i_mmap....
confused,
randolph
--
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/
next prev parent reply other threads:[~2003-08-22 19:05 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-22 14:40 Problems with kernel mmap (failing tst-mmap-eofsync in glibc on parisc) James Bottomley
2003-08-22 16:14 ` David S. Miller
2003-08-22 16:34 ` [parisc-linux] " Matthew Wilcox
2003-08-22 16:39 ` David S. Miller
2003-08-22 17:41 ` Matthew Wilcox
2003-08-22 17:36 ` David S. Miller
2003-08-22 18:01 ` David S. Miller
2003-08-22 18:34 ` Hugh Dickins
2003-08-22 18:31 ` David S. Miller
2003-08-22 18:56 ` James Bottomley
2003-08-22 19:19 ` David S. Miller
2003-08-22 22:27 ` James Bottomley
2003-08-22 22:41 ` David S. Miller
2003-08-23 1:09 ` James Bottomley
2003-08-23 7:22 ` Hugh Dickins
2003-08-23 15:59 ` James Bottomley
2003-08-23 21:44 ` David S. Miller
2003-08-23 21:43 ` David S. Miller
2003-08-23 22:21 ` James Bottomley
2003-08-23 22:51 ` David S. Miller
2003-08-23 23:01 ` James Bottomley
2003-08-23 22:53 ` David S. Miller
2003-08-23 23:11 ` James Bottomley
2003-08-24 0:22 ` David S. Miller
[not found] ` <1061702282.1992.1153.camel@mulgrave>
[not found] ` <20030823222300.4695a0c4.davem@redhat.com>
2003-08-24 16:54 ` James Bottomley
2003-08-22 18:41 ` James Bottomley
2003-08-22 19:02 ` Hugh Dickins
2003-08-22 19:09 ` Randolph Chung [this message]
2003-08-22 16:42 ` Russell King
2003-08-22 16:39 ` David S. Miller
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