From: Mike Frysinger <vapier.adi@gmail.com>
To: David Howells <dhowells@redhat.com>
Cc: Paul Mundt <lethal@linux-sh.org>,
Bernd Schmidt <bernds_cb1@t-online.de>,
Jie Zhang <jie.zhang@analog.com>,
Linux kernel mailing list <linux-kernel@vger.kernel.org>,
uclinux-dist-devel <uclinux-dist-devel@blackfin.uclinux.org>
Subject: Re: avoiding duplicate icache flushing of shared maps on nommu
Date: Wed, 2 Dec 2009 17:41:31 -0500 [thread overview]
Message-ID: <8bd0f97a0912021441m5976be3dw29eef46ba4e76bf9@mail.gmail.com> (raw)
In-Reply-To: <15859.1259763330@redhat.com>
On Wed, Dec 2, 2009 at 09:15, David Howells wrote:
> Mike Frysinger wrote:
> + flush_icache_range(region->vm_start,
> + region->vm_end - region->vm_start);
> - flush_icache_range(result, result + len);
actually, there's one typo here. you want:
flush_icache_range(region->vm_start, region->vm_end);
it doesnt crash on blackfin systems as addresses not in icache get
nopped, but it was causing large delays on exec mappings. i thought
this was due to the nic on the board i was using as it's hitting some
weird pauses by itself.
-mike
next prev parent reply other threads:[~2009-12-02 22:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-28 15:40 Mike Frysinger
2009-11-28 18:53 ` Mike Frysinger
2009-11-30 3:18 ` Jie Zhang
2009-12-02 14:15 ` David Howells
2009-12-02 21:40 ` Mike Frysinger
2009-12-02 22:41 ` Mike Frysinger [this message]
2009-12-02 23:51 ` David Howells
2009-12-03 16:14 ` David Howells
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