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Diffstat (limited to 'arch/powerpc/platforms/pseries/dtl.c')
-rw-r--r--arch/powerpc/platforms/pseries/dtl.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c
index c371bc06434b..e9190073bb97 100644
--- a/arch/powerpc/platforms/pseries/dtl.c
+++ b/arch/powerpc/platforms/pseries/dtl.c
@@ -52,10 +52,10 @@ static u8 dtl_event_mask = 0x7;
/*
- * Size of per-cpu log buffers. Default is just under 16 pages worth.
+ * Size of per-cpu log buffers. Firmware requires that the buffer does
+ * not cross a 4k boundary.
*/
-static int dtl_buf_entries = (16 * 85);
-
+static int dtl_buf_entries = N_DISPATCH_LOG;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
struct dtl_ring {
@@ -151,7 +151,7 @@ static int dtl_start(struct dtl *dtl)
/* Register our dtl buffer with the hypervisor. The HV expects the
* buffer size to be passed in the second word of the buffer */
- ((u32 *)dtl->buf)[1] = dtl->buf_entries * sizeof(struct dtl_entry);
+ ((u32 *)dtl->buf)[1] = DISPATCH_LOG_BYTES;
hwcpu = get_hard_smp_processor_id(dtl->cpu);
addr = __pa(dtl->buf);
@@ -196,13 +196,15 @@ static int dtl_enable(struct dtl *dtl)
long int rc;
struct dtl_entry *buf = NULL;
+ if (!dtl_cache)
+ return -ENOMEM;
+
/* only allow one reader */
if (dtl->buf)
return -EBUSY;
n_entries = dtl_buf_entries;
- buf = kmalloc_node(n_entries * sizeof(struct dtl_entry),
- GFP_KERNEL, cpu_to_node(dtl->cpu));
+ buf = kmem_cache_alloc_node(dtl_cache, GFP_KERNEL, cpu_to_node(dtl->cpu));
if (!buf) {
printk(KERN_WARNING "%s: buffer alloc failed for cpu %d\n",
__func__, dtl->cpu);
@@ -223,7 +225,7 @@ static int dtl_enable(struct dtl *dtl)
spin_unlock(&dtl->lock);
if (rc)
- kfree(buf);
+ kmem_cache_free(dtl_cache, buf);
return rc;
}
@@ -231,7 +233,7 @@ static void dtl_disable(struct dtl *dtl)
{
spin_lock(&dtl->lock);
dtl_stop(dtl);
- kfree(dtl->buf);
+ kmem_cache_free(dtl_cache, dtl->buf);
dtl->buf = NULL;
dtl->buf_entries = 0;
spin_unlock(&dtl->lock);
@@ -365,7 +367,7 @@ static int dtl_init(void)
event_mask_file = debugfs_create_x8("dtl_event_mask", 0600,
dtl_dir, &dtl_event_mask);
- buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0600,
+ buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0400,
dtl_dir, &dtl_buf_entries);
if (!event_mask_file || !buf_entries_file) {