From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Ungerer <gerg@snapgear.com>,
linux-kernel@vger.kernel.org,
David McCullough <davidm@snapgear.com>
Subject: Re: [PATCH]: uClinux (MMU-less) patches against 2.5.28
Date: 26 Jul 2002 18:11:25 +0100 [thread overview]
Message-ID: <1027703485.13429.53.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <26333.1027692205@redhat.com>
On Fri, 2002-07-26 at 15:03, David Woodhouse wrote:
> Good point -- so if a writer encounters a locked page when it's trying to
> unmap them all, it needs to still allow other pages to be mapped in while
> it waits for the original page to become unlocked. That avoids the deadlock
> -- but leaves us with the potential for livelock, with the writer being
> starved by too many other things locking down the pages in question.
>
> I suspect the number of pages getting locked will be sufficiently small
> that the deadlock does not occur.
Well for a starter lets try user writing a block to flash which needs an
erase from a block which happens to be not yet paged in and so still on
the flash you are writing to.
next prev parent reply other threads:[~2002-07-26 15:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-25 6:56 Greg Ungerer
2002-07-25 14:52 ` David Woodhouse
2002-07-26 0:08 ` Greg Ungerer
2002-07-26 1:20 ` Greg Ungerer
2002-07-26 8:19 ` David Woodhouse
2002-07-26 9:39 ` David Woodhouse
2002-07-26 9:58 ` David Woodhouse
2002-07-26 14:03 ` David Woodhouse
2002-07-26 16:01 ` David Woodhouse
2002-07-26 16:27 ` David Woodhouse
2002-07-26 17:27 ` Alan Cox
2002-07-26 17:11 ` Alan Cox [this message]
2002-07-26 14:50 ` Alan Cox
2002-07-26 10:56 ` Alan Cox
2002-07-26 10:39 ` Alan Cox
2002-07-26 15:08 ` gerg
2002-07-26 15:45 ` David Woodhouse
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