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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2015-04-16 01:14:56 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 01:35:19 +0200
commit79553da293d38d63097278de13e28a3b371f43c1 (patch)
tree2b259efd74662ef3d6aed55f86f6490a3e98207b /mm
parentmm: uninline and cleanup page-mapping related helpers (diff)
downloadlinux-79553da293d38d63097278de13e28a3b371f43c1.tar.xz
linux-79553da293d38d63097278de13e28a3b371f43c1.zip
thp: cleanup khugepaged startup
Few trivial cleanups: - no need to call set_recommended_min_free_kbytes() from late_initcall() -- start_khugepaged() calls it; - no need to call set_recommended_min_free_kbytes() from start_khugepaged() if khugepaged is not started; - there isn't much point in running start_khugepaged() if we've just set transparent_hugepage_flags to zero; - start_khugepaged() is misnamed -- it also used to stop the thread; Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/huge_memory.c18
1 files changed, 8 insertions, 10 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 0af19fffe1df..078832cf3636 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -110,10 +110,6 @@ static int set_recommended_min_free_kbytes(void)
int nr_zones = 0;
unsigned long recommended_min;
- /* khugepaged thread has stopped to failed to start */
- if (!khugepaged_thread)
- return 0;
-
for_each_populated_zone(zone)
nr_zones++;
@@ -145,9 +141,8 @@ static int set_recommended_min_free_kbytes(void)
setup_per_zone_wmarks();
return 0;
}
-late_initcall(set_recommended_min_free_kbytes);
-static int start_khugepaged(void)
+static int start_stop_khugepaged(void)
{
int err = 0;
if (khugepaged_enabled()) {
@@ -158,6 +153,7 @@ static int start_khugepaged(void)
pr_err("khugepaged: kthread_run(khugepaged) failed\n");
err = PTR_ERR(khugepaged_thread);
khugepaged_thread = NULL;
+ goto fail;
}
if (!list_empty(&khugepaged_scan.mm_head))
@@ -168,7 +164,7 @@ static int start_khugepaged(void)
kthread_stop(khugepaged_thread);
khugepaged_thread = NULL;
}
-
+fail:
return err;
}
@@ -302,7 +298,7 @@ static ssize_t enabled_store(struct kobject *kobj,
int err;
mutex_lock(&khugepaged_mutex);
- err = start_khugepaged();
+ err = start_stop_khugepaged();
mutex_unlock(&khugepaged_mutex);
if (err)
@@ -651,10 +647,12 @@ static int __init hugepage_init(void)
* where the extra memory used could hurt more than TLB overhead
* is likely to save. The admin can still enable it through /sys.
*/
- if (totalram_pages < (512 << (20 - PAGE_SHIFT)))
+ if (totalram_pages < (512 << (20 - PAGE_SHIFT))) {
transparent_hugepage_flags = 0;
+ return 0;
+ }
- err = start_khugepaged();
+ err = start_stop_khugepaged();
if (err)
goto err_khugepaged;