From dd4cb9f8ac9717c9db2b2afc5a82cb95a3d5dec3 Mon Sep 17 00:00:00 2001 From: Jack Steiner Date: Sat, 22 Apr 2006 09:37:19 -0500 Subject: [IA64-SGI] - Reduce overhead of reading sn_topology MPI programs using certain debug options have a long startup time. This was traced to a "vmalloc/vfree" in the code that reads /proc/sgi_sn/sn_topology. On large systems, vfree requires an IPI to all cpus to do TLB purging. Replace the vmalloc/vfree with kmalloc/kfree. Although the size of the structure being allocated is unknown, it will not not exceed 96 bytes. Signed-off-by: Jack Steiner Signed-off-by: Tony Luck --- arch/ia64/sn/kernel/sn2/sn_hwperf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c index 7ec65bc0ccf..739c948dc50 100644 --- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c +++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c @@ -493,7 +493,7 @@ static int sn_topology_show(struct seq_file *s, void *d) * numalink ports */ sz = obj->ports * sizeof(struct sn_hwperf_port_info); - if ((ptdata = vmalloc(sz)) == NULL) + if ((ptdata = kmalloc(sz, GFP_KERNEL)) == NULL) return -ENOMEM; e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, SN_HWPERF_ENUM_PORTS, obj->id, sz, @@ -541,7 +541,7 @@ static int sn_topology_show(struct seq_file *s, void *d) (SN_HWPERF_IS_NL3ROUTER(obj) || SN_HWPERF_IS_NL3ROUTER(p)) ? "LLP3" : "LLP4"); } - vfree(ptdata); + kfree(ptdata); } return 0; -- cgit v1.2.3