From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 11 May 2000 00:23:19 -0700 (PDT)
From: Linus Torvalds <torvalds@transmeta.com>
Subject: Re: [PATCH] Recent VM fiasco - fixed
In-Reply-To: <20000510215301.A322@stormix.com>
Message-ID: <Pine.LNX.4.10.10005110019370.1355-100000@penguin.transmeta.com>
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To: Simon Kirby <sim@stormix.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.rutgers.edu
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Hmm..

 Having tested some more, the "wait for locked buffer" logic in
fs/buffer.c (sync_page_buffers()) seems toserialize thingsawhole lote more
than I initially thought..

Does it act the way you expect if you change the

	if (buffer_locked(p))
		__wait_on_buffer(p);
	else if (buffer_dirty(p))
		ll_rw_block(..

to a simpler

	if (buffer_dirty(p) && !buffer_locked(p))
		ll_rw_block(..

which doesn't endup serializing the IO all the time?

		Linus

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