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Message-ID: <20100530123248.GO26177@thunk.org> Date: Sun, 30 May 2010 08:32:48 -0400 From: tytso@....edu To: Peter Hallberg <hallberg68@...mail.com> Cc: linux-kernel@...r.kernel.org Subject: Re: What happened to mount option "noextents" On Sun, May 30, 2010 at 02:07:06PM +0200, Peter Hallberg wrote: > > On Ubuntu 9.04 it is possible to mount an ext4 file system with the > mount option "noextents" but on Ubuntu 10.04 it gives the error > message: Ext4: Unrecognized mount option "noextents" in dmesg. Both the "extents" and "noexents" mount options were removed in newer kernels. If you want to turn on extents, the right answer is to use the "tune2fs -O extents" command. The "noextents" mount option didn't really make much sense, since it basically was either no-op (if extents were not enabled), and was mostly useless (if extents were enabled in the file system), since it basically meant, "create new files without using extents". But since the old files were still extents-based, it didn't make the file system any more compatible with ext3 file systems. Basically, since we couldn't think of a good use case where the mount options made sense, and ext4 has way too many mount options already, we decided to remove them. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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