On 21/04/2024 22:44, Maíra Canal wrote:
Add a modparam for turning off Big/Super Pages to make sure that if an
user doesn't want Big/Super Pages enabled, it can disabled it by setting
the modparam to false.
Signed-off-by: Maíra Canal
---
drivers/gpu/drm/v3d/v3d_drv.c | 8
drivers/gpu/drm/v3d/v3d_gemfs.c | 5 +
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index 3debf37e7d9b..bc8c8905112a 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -36,6 +36,14 @@
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
+bool super_pages = true;
+
+/* Only expose the `super_pages` modparam if THP is enabled. */
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
I would have put bool super_pages in here so it can get compiled out.
+module_param_named(super_pages, super_pages, bool, 0400);
+MODULE_PARM_DESC(super_pages, "Enable/Disable Super Pages support.");
+#endif
+
static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
diff --git a/drivers/gpu/drm/v3d/v3d_gemfs.c b/drivers/gpu/drm/v3d/v3d_gemfs.c
index 31cf5bd11e39..5fa08263cff2 100644
--- a/drivers/gpu/drm/v3d/v3d_gemfs.c
+++ b/drivers/gpu/drm/v3d/v3d_gemfs.c
@@ -11,6 +11,11 @@ void v3d_gemfs_init(struct v3d_dev *v3d)
char huge_opt[] = "huge=within_size";
struct file_system_type *type;
struct vfsmount *gemfs;
+ extern bool super_pages;
+
+ /* The user doesn't want to enable Super Pages */
+ if (!super_pages)
+ goto err;
And if this hunk is moved after the CONFIG_TRANSPARENT_HUGEPAGE check
just below I hope compiler can be happy with that.
Regards,
Tvrtko
/*
* By creating our own shmemfs mountpoint, we can pass in
