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    SubjectRe: [EXT4 set 1][PATCH 1/2] Add noextents mount option
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    On Tue, 2007-07-10 at 16:30 -0700, Andrew Morton wrote:
    > On Sun, 01 Jul 2007 03:35:48 -0400
    > Mingming Cao <cmm@us.ibm.com> wrote:
    >
    > > Add a mount option to turn off extents.
    >
    > Please update the changelog to describe the reason for making this change.
    >
    >

    Sure, I will update the changelog, mainly this is for wide testing of
    extents feature in ext4dev.

    > > Signed-off-by: Mingming Cao <cmm@us.ibm.com>
    > > ---
    > > Index: linux-2.6.22-rc4/fs/ext4/super.c
    > > ===================================================================
    > > --- linux-2.6.22-rc4.orig/fs/ext4/super.c 2007-06-11 17:02:18.000000000 -0700
    > > +++ linux-2.6.22-rc4/fs/ext4/super.c 2007-06-11 17:02:22.000000000 -0700
    > > @@ -725,7 +725,7 @@
    > > Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
    > > Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
    > > Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
    > > - Opt_grpquota, Opt_extents,
    > > + Opt_grpquota, Opt_extents, Opt_noextents,
    > > };
    > >
    > > static match_table_t tokens = {
    > > @@ -776,6 +776,7 @@
    > > {Opt_usrquota, "usrquota"},
    > > {Opt_barrier, "barrier=%u"},
    > > {Opt_extents, "extents"},
    > > + {Opt_noextents, "noextents"},
    > > {Opt_err, NULL},
    > > {Opt_resize, "resize"},
    > > };
    > > @@ -1111,6 +1112,9 @@
    > > case Opt_extents:
    > > set_opt (sbi->s_mount_opt, EXTENTS);
    > > break;
    > > + case Opt_noextents:
    > > + clear_opt (sbi->s_mount_opt, EXTENTS);
    > > + break;
    > > default:
    > > printk (KERN_ERR
    > > "EXT4-fs: Unrecognized mount option \"%s\" "
    > >
    > >
    > > -
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