Pekka Paalanen a écrit :
Relay has per-cpu buffers, but mmiotrace was using only a single flag
for detecting buffer full/not-full transitions. The new code makes
this per-cpu and actually counts missed events.
Signed-off-by: Pekka Paalanen <[EMAIL PROTECTED]>
---
arch/x86/kernel/mmiotrace/mmio-mod.c | 26 ++++++++++++++++----------
1 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kernel/mmiotrace/mmio-mod.c
b/arch/x86/kernel/mmiotrace/mmio-mod.c
index 82ae920..f492b65 100644
--- a/arch/x86/kernel/mmiotrace/mmio-mod.c
+++ b/arch/x86/kernel/mmiotrace/mmio-mod.c
@@ -29,6 +29,7 @@
#include <asm/pgtable.h>
#include <linux/mmiotrace.h>
#include <asm/e820.h> /* for ISA_START_ADDRESS */
+#include <asm/atomic.h>
#include "kmmio.h"
#include "pf_in.h"
@@ -47,9 +48,13 @@ struct trap_reason {
int active_traces;
};
+/* Accessed per-cpu. */
static struct trap_reason pf_reason[NR_CPUS];
static struct mm_io_header_rw cpu_trace[NR_CPUS];
+/* Access to this is not per-cpu. */
+static atomic_t dropped[NR_CPUS];
+
Please dont introduce NR_CPUS new arrays, since people are working hard to zap
them from kernel.
You probably can use a per_cpu variable ?
Thank you
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