linux-kernel - Re: [13/17] Virtual compound page freeing in interrupt context

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0709201049230.8509@schroedinger.engr.sgi.com>
Date:	Thu, 20 Sep 2007 10:50:21 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	Christoph Hellwig <hch@....de>, Mel Gorman <mel@...net.ie>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Chinner <dgc@....com>, Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [13/17] Virtual compound page freeing in interrupt context

On Wed, 19 Sep 2007, Nick Piggin wrote:

> > Removing a virtual mappping *must* be done with interrupts enabled
> > since tlb_xx functions are called that rely on interrupts for
> > processor to processor communications.
> 
> These things will clash drastically with my lazy TLB flushing and scalability
> work. Actually the lazy TLB flushing will provide a natural way to defer
> unmapping at interrupt time, and the scalability work should make it
> easier to vmap from interrupt context too, if you really need that.

Both would be good to have.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/