<s>
Among	O
Linux	B-Operating_System
kernel	I-Operating_System
developers	O
,	O
the	O
-mm	B-Application
tree	O
refers	O
to	O
a	O
version	O
of	O
the	O
kernel	B-Operating_System
source	O
code	O
maintained	O
by	O
Andrew	O
Morton	O
.	O
</s>
<s>
The	O
-mm	B-Application
kernel	B-Operating_System
tree	O
used	O
to	O
fill	O
the	O
role	O
of	O
Linux	B-Operating_System
kernel	I-Operating_System
development	O
builds	O
,	O
formerly	O
identified	O
by	O
odd	O
version	O
numbers	O
following	O
"	O
2.6.	O
"	O
</s>
<s>
(	O
see	O
this	O
section	O
on	O
Linux	B-Operating_System
kernel	I-Operating_System
version	O
numbering	O
)	O
.	O
</s>
<s>
New	O
and	O
experimental	O
code	O
used	O
to	O
find	O
its	O
way	O
into	O
a	O
2.6.x-mm	O
kernel	B-Operating_System
build	O
.	O
</s>
<s>
Historically	O
,	O
the	O
-mm	B-Application
tree	O
focused	O
on	O
new	O
developments	O
for	O
the	O
memory	O
management	O
part	O
of	O
the	O
kernel	B-Operating_System
(	O
mm	O
)	O
.	O
</s>
<s>
Occasionally	O
,	O
the	O
-mm	B-Application
tree	O
was	O
overloaded	O
with	O
new	O
patches	O
,	O
so	O
testing	O
it	O
became	O
difficult	O
.	O
</s>
<s>
The	O
presence	O
of	O
the	O
new	O
linux-next	B-Operating_System
git	O
repository	O
has	O
offloaded	O
much	O
of	O
the	O
work	O
that	O
made	O
mm	O
maintenance	O
troublesome	O
,	O
allowing	O
Morton	O
to	O
continue	O
to	O
use	O
quilt	B-Application
to	O
manage	O
his	O
series	O
of	O
"	O
mmotm	O
"	O
(	O
mm	O
of	O
the	O
moment	O
)	O
patches	O
.	O
</s>
<s>
Morton	O
includes	O
a	O
subset	O
of	O
the	O
mmotm	O
patches	O
in	O
linux-next	B-Operating_System
,	O
which	O
has	O
a	O
head	O
called	O
"	O
linux-next/akpm	O
"	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
git	O
tree	O
that	O
includes	O
the	O
patches	O
that	O
appear	O
in	O
releases	O
of	O
the	O
mm	B-Application
tree	I-Application
.	O
</s>
<s>
To	O
get	O
all	O
of	O
the	O
mm	O
patches	O
at	O
any	O
given	O
time	O
,	O
developers	O
still	O
need	O
quilt	B-Application
or	O
ad	O
hoc	O
shell	O
scripts	O
to	O
apply	O
the	O
full	O
set	O
of	O
patches	O
.	O
</s>
