linux-kernel - Re: [PATCH 2/9]: Reduce Log I/O latency

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Message-ID: <474A2B62.20204@sgi.com>
Date:	Mon, 26 Nov 2007 13:11:46 +1100
From:	Lachlan McIlroy <lachlan@....com>
To:	David Chinner <dgc@....com>
CC:	xfs-oss <xfs@....sgi.com>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/9]: Reduce Log I/O latency

> Index: 2.6.x-xfs-new/fs/xfs/xfs_log.c
> ===================================================================
> --- 2.6.x-xfs-new.orig/fs/xfs/xfs_log.c	2007-11-22 10:47:21.945395328 +1100
> +++ 2.6.x-xfs-new/fs/xfs/xfs_log.c	2007-11-22 10:53:11.556186722 +1100
> @@ -1443,6 +1443,8 @@ xlog_sync(xlog_t		*log,
>  	XFS_BUF_ZEROFLAGS(bp);
>  	XFS_BUF_BUSY(bp);
>  	XFS_BUF_ASYNC(bp);
> +	XFS_BUF_SET_LOGBUF(bp);
> +
>  	/*
>  	 * Do an ordered write for the log block.
>  	 * Its unnecessary to flush the first split block in the log wrap case.

Whichever way you go with this one Dave you should probably add another
XFS_BUF_SET_LOGBUF() call for the buffer split case further down in the
same function.
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