Evolution-X-Devices/kernel_xiaomi_sm8150
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drm/msm: Use kmem_cache pool for struct vblank_work

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These get allocated and freed millions of times on this kernel tree.

Use a dedicated kmem_cache pool and avoid costly dynamic memory allocations.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
This commit is contained in:
Park Ju Hyung
2019-07-12 00:53:59 +09:00
committed by Pranav Vashi
parent 2ee241ec6c
commit 5570aaa915
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/msm/msm_drv.c
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@@ -66,6 +66,7 @@ static DEFINE_MUTEX(msm_release_lock);
atomic_t resume_pending;
wait_queue_head_t resume_wait_q;
static struct kmem_cache *kmem_vblank_work_pool;
static void msm_fb_output_poll_changed(struct drm_device *dev)
{
@@ -260,7 +261,7 @@ static void vblank_ctrl_worker(struct kthread_work *work)
else
kms->funcs->disable_vblank(kms, priv->crtcs[cur_work->crtc_id]);
kfree(cur_work);
kmem_cache_free(kmem_vblank_work_pool, cur_work);
}
static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
@@ -271,7 +272,7 @@ static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
if (!priv || crtc_id >= priv->num_crtcs)
return -EINVAL;
cur_work = kzalloc(sizeof(*cur_work), GFP_ATOMIC);
cur_work = kmem_cache_zalloc(kmem_vblank_work_pool, GFP_ATOMIC);
if (!cur_work)
return -ENOMEM;
@@ -2361,6 +2362,7 @@ static int __init msm_drm_register(void)
return -EINVAL;
DBG("init");
kmem_vblank_work_pool = KMEM_CACHE(vblank_work, SLAB_HWCACHE_ALIGN | SLAB_PANIC);
msm_smmu_driver_init();
msm_dsi_register();
msm_edp_register();