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Message-ID: <BANLkTimFCQNt=Bptn-rhPeTbYRgfGdQLxQ@mail.gmail.com> Date: Fri, 17 Jun 2011 09:08:19 -0400 From: Greg Freemyer <greg.freemyer@...il.com> To: Kazuya Mio <k-mio@...jp.nec.com> Cc: Tomasz Chmielewski <mangoo@...g.org>, linux-ext4@...r.kernel.org Subject: Re: [PATCH 00/11 RESEND] e4defrag: fragmentation score rework and cleanups On Fri, Jun 17, 2011 at 1:13 AM, Kazuya Mio <k-mio@...jp.nec.com> wrote: > 2011/06/16 17:18, Tomasz Chmielewski wrote: >> >> I noticed that when using e4defrag on such a file-based image, while the >> guest is running (i.e. the file is in use), all IO from that guest to >> the disk (disk is this file) is "frozen". >> >> In other words, as soon as we run e4defrag, any guest writes to that >> file will only complete if e4defrag finishes. As the images can be quite >> big, it can mean guest IO can be frozen even for hours. >> >> >> Is it a known/intended limitation (at least, it behaved like this when I >> tried e4defrag a few months ago)? > > Thank you for the feedback. I will try to reproduce this problem later. > > Regards, > Kazuya Mio Kazuya, When trying to come up with a better plan for handling large files, you may want to review this msg and Akira's response from last spring: http://www.kerneltrap.com/mailarchive/linux-ext4/2010/3/30/6899823 Greg -- 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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