linux-kernel - Re: [PATCH] fix readahead pipeline break caused by block plug

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Date:	Tue, 31 Jan 2012 06:34:52 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Wu Fengguang <wfg@...ux.intel.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Shaohua Li <shaohua.li@...el.com>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>,
	Herbert Poetzl <herbert@...hfloor.at>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [PATCH] fix readahead pipeline break caused by block plug

On Tue, Jan 31, 2012 at 06:57:54PM +0800, Wu Fengguang wrote:
> The problem is, there are a dozen of ->direct_IO callback functions.
> While there are only two ->direct_IO() callers, one for READ and
> another for WRITE, which are much easier to deal with.

So what?  Better do a bit more work now and keep the damn thing
maintainable.

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