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Message-ID: <48EAF0C8.9060104@cn.fujitsu.com> Date: Tue, 07 Oct 2008 13:16:56 +0800 From: Li Zefan <lizf@...fujitsu.com> To: "Theodore Ts'o" <tytso@....edu> CC: linux-ext4@...r.kernel.org Subject: Re: [PATCH, RFC] ext4: Rename ext4dev to ext4 > diff --git a/fs/Kconfig b/fs/Kconfig > index abccb5d..afb14f2 100644 > --- a/fs/Kconfig > +++ b/fs/Kconfig > @@ -136,37 +136,37 @@ config EXT3_FS_SECURITY > If you are not using a security module that requires using > extended attributes for file security labels, say N. > > -config EXT4DEV_FS > - tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)" > - depends on EXPERIMENTAL > +config EXT4_FS > + tristate "The Extended 4 (ext4) filesystem" > select JBD2 > select CRC16 > help > - Ext4dev is a predecessor filesystem of the next generation > - extended fs ext4, based on ext3 filesystem code. It will be > - renamed ext4 fs later, once ext4dev is mature and stabilized. > + This is the next generation of the ext3 filesystem. > > Unlike the change from ext2 filesystem to ext3 filesystem, > - the on-disk format of ext4dev is not the same as ext3 any more: > - it is based on extent maps and it supports 48-bit physical block > - numbers. These combined on-disk format changes will allow > - ext4dev/ext4 to handle more than 16 TB filesystem volumes -- > - a hard limit that ext3 cannot overcome without changing the > - on-disk format. > - > - Other than extent maps and 48-bit block numbers, ext4dev also is > - likely to have other new features such as persistent preallocation, > - high resolution time stamps, and larger file support etc. These > - features will be added to ext4dev gradually. > + the on-disk format of ext4 is not backwardscompatible with s/backwardscompatible/backwards compatible > + ext3; it is based on extent maps and it supports 48-bit > + physical block numbers. The ext4 filesystem also supports delayed > + allocation, persistent preallocation, high resolution time stamps, > + and a number of other features to improve performance and speed > + up fsck time. For more information, please see the web pages at > + http://ext4.wiki.kernel.org. > + > + The ext4 filesystem will support mounting an ext3 > + filesystem; while there will be some performance gains from > + the delayed allocation and inode table readeahad, the best s/readeahad/readahead > + performance gains will require enabling ext4 features in the > + filesystem, or formating a new filesystem as an ext4 > + filesystem initially. > > To compile this file system support as a module, choose M here. The > module will be called ext4dev. > > If unsure, say N. ... > diff --git a/fs/Makefile b/fs/Makefile > index a1482a5..de404b0 100644 > --- a/fs/Makefile > +++ b/fs/Makefile > @@ -69,7 +69,7 @@ obj-$(CONFIG_DLM) += dlm/ > # Do not add any filesystems before this line > obj-$(CONFIG_REISERFS_FS) += reiserfs/ > obj-$(CONFIG_EXT3_FS) += ext3/ # Before ext2 so root fs can be ext3 > -obj-$(CONFIG_EXT4DEV_FS) += ext4/ # Before ext2 so root fs can be ext4dev > +obj-$(CONFIG_EXT4_FS) += ext4/ # Before ext2 so root fs can be ext4dev the tailing word is still ext4dev > obj-$(CONFIG_JBD) += jbd/ > obj-$(CONFIG_JBD2) += jbd2/ > obj-$(CONFIG_EXT2_FS) += ext2/ -- 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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