In looking at the way the 1.4.1 linux client code allocates memory,
I notice that it does not use __GFP_HIGHMEM. I see that
at least one of my main machines appears to have a high
memory zone, as witnessed by the boot up messages:
Jun 2 04:13:20 brain kernel: Linux version 2.4.20-35.9smp ([EMAIL PROTECTED])
(gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #1
SMP Thu Jun 24 06:51:49 EDT 2004
Jun 2 04:13:20 brain kernel: BIOS-provided physical RAM map:
Jun 2 04:13:20 brain kernel: BIOS-e820: 0000000000000000 - 000000000009fc00
(usable)
Jun 2 04:13:20 brain kernel: BIOS-e820: 000000000009fc00 - 00000000000a0000
(reserved)
Jun 2 04:13:20 brain kernel: BIOS-e820: 00000000000e0000 - 0000000000100000
(reserved)
Jun 2 04:13:20 brain kernel: BIOS-e820: 0000000000100000 - 0000000080000000
(usable)
Jun 2 04:13:20 brain kernel: BIOS-e820: 00000000fec00000 - 00000000fed00000
(reserved)
Jun 2 04:13:20 brain kernel: BIOS-e820: 00000000fee00000 - 00000000fee01000
(reserved)
Jun 2 04:13:20 brain kernel: BIOS-e820: 00000000ffb80000 - 0000000100000000
(reserved)
Jun 2 04:13:20 brain kernel: 1152MB HIGHMEM available.
Jun 2 04:13:20 brain kernel: 896MB LOWMEM available.
Jun 2 04:13:20 brain kernel: found SMP MP-table at 000ff780
Jun 2 04:13:20 brain kernel: hm, page 000ff000 reserved twice.
Jun 2 04:13:20 brain syslog: klogd startup succeeded
Jun 2 04:13:20 brain kernel: hm, page 00100000 reserved twice.
Jun 2 04:13:20 brain kernel: hm, page 000f9000 reserved twice.
Jun 2 04:13:20 brain kernel: hm, page 000fa000 reserved twice.
Jun 2 04:13:20 brain kernel: On node 0 totalpages: 524288
Jun 2 04:13:20 brain kernel: zone(0): 4096 pages.
Jun 2 04:13:20 brain kernel: zone(1): 225280 pages.
Jun 2 04:13:20 brain kernel: zone(2): 294912 pages.
If I understand the kernel allocator correctly, the following patch
seems appropriate to enable kmalloc calls to use high memory:
--- src/afs/LINUX/osi_alloc.c.~1~ 2004-12-07 01:12:12.000000000 -0500
+++ src/afs/LINUX/osi_alloc.c 2006-06-02 11:14:46.000000000 -0400
@@ -90,9 +90,9 @@
if (asize <= MAX_KMALLOC_SIZE) {
new = (void *)(unsigned long)kmalloc(asize,
#ifdef GFP_NOFS
- GFP_NOFS
+ GFP_NOFS | __GFP_HIGHMEM
#else
- GFP_KERNEL
+ GFP_KERNEL | __GFP_HIGHMEM
#endif
);
if (new) /* piggy back alloc type */
--
Joe Buehler
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