Re: [patch] tune vmalloc size

[Ingo Molnar <mingo@elte.hu>]

* Andrew Morton <akpm@osdl.org> wrote:

> Ingo Molnar <mingo@elte.hu> wrote:
> >
> > +		if (c == ' ' && !memcmp(from, "vmalloc=", 8))
> > +			__VMALLOC_RESERVE = memparse(from+8, &from);
> 
> u o akpm an update to kernel-parameters.txt, please.

here you go:

--- Documentation/kernel-parameters.txt.orig
+++ Documentation/kernel-parameters.txt
@@ -453,6 +453,11 @@ running once the system is up.
 	hd?=		[HW] (E)IDE subsystem
 	hd?lun=		See Documentation/ide.txt.
 
+	highmem=nn[KMG]	[KNL,BOOT] forces the highmem zone to have an exact
+			size of <nn>. This works even on boxes that have no
+			highmem otherwise. This also works to reduce highmem
+			size on bigger boxes.
+
 	hisax=		[HW,ISDN]
 			See Documentation/isdn/README.HiSax.
 
@@ -1280,6 +1285,12 @@ running once the system is up.
 			This is actually a boot loader parameter; the value is
 			passed to the kernel using a special protocol.
 
+	vmalloc=nn[KMG]	[KNL,BOOT] forces the vmalloc area to have an exact
+			size of <nn>. This can be used to increase the
+			minimum size (128MB on x86). It can also be used to
+			decrease the size and leave more room for directly
+			mapped kernel RAM.
+
 	vmhalt=		[KNL,S390]
 
 	vmpoff=		[KNL,S390]