This resets all per-thread and per-process statistics across exec
syscalls or after kernel threads detach from the mm. The past
statistical NUMA information is unlikely to be relevant for the future
in these cases.
Acked-by: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
---
fs/exec.c | 7 +++++++
mm/mmu_context.c | 3 +++
2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/fs/exec.c b/fs/exec.c
index 574cf4d..1d55077 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -55,6 +55,7 @@
#include <linux/pipe_fs_i.h>
#include <linux/oom.h>
#include <linux/compat.h>
+#include <linux/autonuma.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
@@ -1172,6 +1173,12 @@ void setup_new_exec(struct linux_binprm * bprm)
flush_signal_handlers(current, 0);
flush_old_files(current->files);
+
+ /*
+ * Reset autonuma counters, as past NUMA information
+ * is unlikely to be relevant for the future.
+ */
+ autonuma_setup_new_exec(current);
}
EXPORT_SYMBOL(setup_new_exec);
diff --git a/mm/mmu_context.c b/mm/mmu_context.c
index 3dcfaf4..e6fff1c 100644
--- a/mm/mmu_context.c
+++ b/mm/mmu_context.c
@@ -7,6 +7,7 @@
#include <linux/mmu_context.h>
#include <linux/export.h>
#include <linux/sched.h>
+#include <linux/autonuma.h>
#include <asm/mmu_context.h>
@@ -52,6 +53,8 @@ void unuse_mm(struct mm_struct *mm)
{
struct task_struct *tsk = current;
+ autonuma_setup_new_exec(tsk);
+
task_lock(tsk);
sync_mm_rss(mm);
tsk->mm = NULL;
--
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