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Date: Mon, 29 Jun 2009 23:49:59 +0200 From: Andreas Dilger <adilger@....com> To: Akira Fujita <a-fujita@...jp.nec.com> Cc: "Steinar H. Gunderson" <sgunderson@...foot.com>, Kazuya Mio <k-mio@...jp.nec.com>, linux-ext4@...r.kernel.org Subject: Re: Segmentation fault in e4defrag -c On Jun 29, 2009 15:03 +0900, Akira Fujita wrote: > > Size: 4050385 Blocks: 0 IO Block: 4096 regular file > > Device: fd12h/64786d Inode: 688755 Links: 1 > > Access: (0644/-rw-r--r--) Uid: ( 1000/ sesse) Gid: ( 1000/ sesse) > > Access: 2009-05-30 03:08:38.724454316 +0200 > > Modify: 2008-09-01 20:38:26.135589449 +0200 > > Change: 2008-09-01 20:38:26.135589449 +0200 > > File size is "4050385" but Blocks is "0" > probably means blocks are not allocated yet or file is *corrupted*. > Is your mp3 file available? Well, this is a sparse file for some reason (e.g. failed mp3 p2p download). > Anyway, with this patch, 0 blocks file is skipped, > therefore the segmentation fault you had will not happen. Is it possible that the code has not been tested with sparse files? In that case, the check for size == 0 is only going to catch a single case of problem, and not handle general sparse files. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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