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Commit 7679bdf3 authored by Deepak Kumar's avatar Deepak Kumar
Browse files

Revert "msm: kgsl: Do not memset pages to zero while adding to pool" 



This reverts commit 90d6246f.

To address the launch latency issue seen because of increase in
memory allocation time.

Change-Id: I147ca8607337541b7a29056b4bd1b46aa374c6e3
Signed-off-by: default avatarDeepak Kumar <dkumar@codeaurora.org>
parent 84a47e8c

drivers/gpu/msm/kgsl_pool.c

+16 −6
Original line number Diff line number Diff line
@@ -65,19 +65,26 @@ _kgsl_get_pool_from_order(unsigned int order) 


/* Map the page into kernel and zero it out */

static void

_kgsl_pool_zero_page(struct page *p)

_kgsl_pool_zero_page(struct page *p, unsigned int pool_order)

{

	void *addr = kmap_atomic(p);

	int i;



	for (i = 0; i < (1 << pool_order); i++) {

		struct page *page = nth_page(p, i);

		void *addr = kmap_atomic(page);



		memset(addr, 0, PAGE_SIZE);

		dmac_flush_range(addr, addr + PAGE_SIZE);

		kunmap_atomic(addr);

	}

}



/* Add a page to specified pool */

static void

_kgsl_pool_add_page(struct kgsl_page_pool *pool, struct page *p)

{

	_kgsl_pool_zero_page(p, pool->pool_order);



	spin_lock(&pool->list_lock);

	list_add_tail(&p->lru, &pool->page_list);

	pool->page_count++;
@@ -322,6 +329,7 @@ int kgsl_pool_alloc_page(int *page_size, struct page **pages, 
			} else

				return -ENOMEM;

		}

		_kgsl_pool_zero_page(page, order);

		goto done;

	}
@@ -341,6 +349,7 @@ int kgsl_pool_alloc_page(int *page_size, struct page **pages, 
			page = alloc_pages(gfp_mask, order);

			if (page == NULL)

				return -ENOMEM;

			_kgsl_pool_zero_page(page, order);

			goto done;

		}

	}
@@ -370,12 +379,13 @@ int kgsl_pool_alloc_page(int *page_size, struct page **pages, 
			} else

				return -ENOMEM;

		}



		_kgsl_pool_zero_page(page, order);

	}



done:

	for (j = 0; j < (*page_size >> PAGE_SHIFT); j++) {

		p = nth_page(page, j);

		_kgsl_pool_zero_page(p);

		pages[pcount] = p;

		pcount++;

	}