Andrea Arcangeli wrote:
 > On Thu, Sep 12, 2002 at 07:14:14PM -0700, Samuel Flory wrote:
 >
 >>Andrea Arcangeli wrote:
 >>
 >>>On Thu, Sep 12, 2002 at 07:47:48PM -0500, Stephen Lord wrote:
 >>>
 >>>>How much memory is in the machine by the way? And Andrea, is the
 >>>>vmalloc space size reduced in the 3G user space configuration?
 >>>
 >>>it's not reduced, it's the usual 128m.
 >>>
 >>>BTW, I forgot to say that to really take advantage of CONFIG_2G one
 >>>should increase __VMALLOC_RESERVE too, it's not directly in function of
 >>>the CONFIG_2G.
 >>>
 >>
 >>So how much do you recommend increasing it?   Currently it's:
 >>include/asm-i386/page.h:#define __VMALLOC_RESERVE       (128 << 20)
 >>include/asm/page.h:#define __VMALLOC_RESERVE    (128 << 20)
 >
 >
 > you can try to compile with CONFIG_3G and to set __VMALLOC_RESERVE to
 > (512 << 20) and see if it helps. If it only happens a bit later then
 > it's most probably an address space leak, should be easy to track down
 > some debugging instrumentation.

I just produced this little patch for 2.5.  It should provide a bit of the extra
information that you were looking for.  It adds some entries to /proc/meminfo
that look like this:

VMalTotal:	92123 kB
VmalUsed:	 1264 kB
VMalChunk:	80315 kB

Total available, total used, and largest chunk available.

It is simple enough that a backport shouldn't be any problem at all.  Anybody
interested?

-- 
Dave Hansen
haveblue@us.ibm.com