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| author | Tony Luck <tony.luck@intel.com> | 2010-01-07 16:10:57 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2010-01-07 16:10:57 -0800 |
| commit | 6c57a332901f851bd092aba7a2b4d8ef4e643829 (patch) | |
| tree | 049e913b0c7b4c678ba699ac02f62e16db8cb515 /arch/ia64/include | |
| parent | 410dc0aac63d1500faeabcbaecce4f4266380ed1 (diff) | |
| download | op-kernel-dev-6c57a332901f851bd092aba7a2b4d8ef4e643829.zip op-kernel-dev-6c57a332901f851bd092aba7a2b4d8ef4e643829.tar.gz | |
[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.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/tlb.h b/arch/ia64/include/asm/tlb.h index 85d965c..23cce99 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 |
