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authorTony Luck <tony.luck@intel.com>2010-01-08 03:10:57 +0300
committerTony Luck <tony.luck@intel.com>2010-01-08 03:10:57 +0300
commit6c57a332901f851bd092aba7a2b4d8ef4e643829 (patch)
tree049e913b0c7b4c678ba699ac02f62e16db8cb515 /arch/ia64/include
parent410dc0aac63d1500faeabcbaecce4f4266380ed1 (diff)
downloadlinux-6c57a332901f851bd092aba7a2b4d8ef4e643829.tar.xz
[IA64] __per_cpu_idtrs[] is a memory hog
__per_cpu_idtrs is statically allocated ... on CONFIG_NR_CPUS=4096 systems it hogs 16MB of memory. This is way too much for a quite probably unused facility (only KVM uses dynamic TR registers). Change to an array of pointers, and allocate entries as needed on a per cpu basis. Change the name too as the __per_cpu_ prefix is confusing (this isn't a classic <linux/percpu.h> type object). Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/include')
-rw-r--r--arch/ia64/include/asm/tlb.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/tlb.h b/arch/ia64/include/asm/tlb.h
index 85d965cb19a0..23cce999eb1c 100644
--- a/arch/ia64/include/asm/tlb.h
+++ b/arch/ia64/include/asm/tlb.h
@@ -74,7 +74,7 @@ struct ia64_tr_entry {
extern int ia64_itr_entry(u64 target_mask, u64 va, u64 pte, u64 log_size);
extern void ia64_ptr_entry(u64 target_mask, int slot);
-extern struct ia64_tr_entry __per_cpu_idtrs[NR_CPUS][2][IA64_TR_ALLOC_MAX];
+extern struct ia64_tr_entry *ia64_idtrs[NR_CPUS];
/*
region register macros