[PATCH 6.6 045/134] nouveau: find the smallest page allocation to cover a buffer alloc.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Airlie <airlied@xxxxxxxxxx>

commit e9ba37d9f9a6872b069dd893bd86a7d77ba8c153 upstream.

With the new uapi we don't have the comp flags on the allocation,
so we shouldn't be using the first size that works, we should be
iterating until we get the correct one.

This reduces allocations from 2MB to 64k in lots of places.

Fixes dEQP-VK.memory.allocation.basic.size_8KiB.forward.count_4000
on my ampere/gsp system.

Cc: stable@xxxxxxxxxxxxxxx # v6.6
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Reviewed-by: Faith Ekstrand <faith.ekstrand@xxxxxxxxxxxxx>
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230811031520.248341-1-airlied@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/nouveau/nouveau_bo.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 0f3bd187ede6..280d1d9a559b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -318,8 +318,9 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain,
 			    (!vmm->page[i].host || vmm->page[i].shift > PAGE_SHIFT))
 				continue;
 
-			if (pi < 0)
-				pi = i;
+			/* pick the last one as it will be smallest. */
+			pi = i;
+
 			/* Stop once the buffer is larger than the current page size. */
 			if (*size >= 1ULL << vmm->page[i].shift)
 				break;
-- 
2.43.0







[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux