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Message-ID: <4BE42E6B.90405@ddn.com> Date: Fri, 7 May 2010 17:14:51 +0200 From: Bernd Schubert <bschubert@....com> To: Andi Kleen <andi@...obates.de> CC: Bernd Schubert <bs_lists@...ef.fastmail.fm>, "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>, Andreas Dilger <andreas.dilger@...cle.com> Subject: Re: status of MMP? -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 05/07/2010 05:06 PM, Andi Kleen wrote: > Bernd Schubert <bs_lists@...ef.fastmail.fm> writes: > >> >> Lustres ldiskfs already has MMP support for several years and I would like to >> know what is the blocker for ext4? Updating the MMP patches for ext4-git >> should be fairly simple. > > AFAIK simply nobody has done the work and submitted it. > > Simply adding it would break LVM snapshots though, so there's a > compatibility issue. Well, firstly, you are not forced to enable MMP. And then, I don't understand what should be the issue with MMP. We use snapshots + ldiskfs + MMP all the time. I have a basic understanding how the MMP code works, but not as thorough as the Orcacle Lustre team. Andreas, would you mind if I post updated patches here? Cheers, Bernd -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkvkLmsACgkQqh74FqyuOzT0bwCfQQRWqaUcTM0xQ1dgyAv483t1 2fQAniCT6AWBdqJiKWQmpUMdYvEKKubW =U2NE -----END PGP SIGNATURE----- -- 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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