linux-ext4 - Re: [PATCH v3]Ext4: journal credits reservation fixes for DIO, fallocate and delalloc writepages

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Message-ID: <20080801192947.GA8789@mit.edu>
Date:	Fri, 1 Aug 2008 15:29:47 -0400
From:	Theodore Tso <tytso@....edu>
To:	Mingming Cao <cmm@...ibm.com>
Cc:	Shehjar Tikoo <shehjart@....unsw.edu.au>,
	linux-ext4@...r.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Andreas Dilger <adilger@....com>
Subject: Re: [PATCH v3]Ext4: journal credits reservation fixes for DIO,
	fallocate and delalloc writepages

I'm noticing that when I reboot, presumably either just before or just
after remounting the filesystem read-only, I'm getting a whole series
of

ext4_da_writepages: Not enough credits to flush N pages

.. where N is mostly 1, but occasionally will be 2.

I'm not sure why this is happening; I did run sync before rebooting,
and I haven't noticed any files written just before the reboot getting
corrupted, but there is something strange happening here.

	       	     		  	  	    - Ted
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