diff mbox series

[RFC,v3,7/8] drivers: virtio_mem: use pageblock size as the minimum virtio_mem size.

Message ID 20220105214756.91065-8-zi.yan@sent.com (mailing list archive)
State Superseded
Headers show
Series Use pageblock_order for cma and alloc_contig_range alignment. | expand

Commit Message

Zi Yan Jan. 5, 2022, 9:47 p.m. UTC 
From: Zi Yan <ziy@nvidia.com>

alloc_contig_range() now only needs to be aligned to pageblock_order,
drop virtio_mem size requirement that it needs to be the max of
pageblock_order and MAX_ORDER.

Signed-off-by: Zi Yan <ziy@nvidia.com>
---
 drivers/virtio/virtio_mem.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

David Hildenbrand Jan. 14, 2022, 1:44 p.m. UTC | #1 
On 05.01.22 22:47, Zi Yan wrote:
> From: Zi Yan <ziy@nvidia.com>
> 
> alloc_contig_range() now only needs to be aligned to pageblock_order,
> drop virtio_mem size requirement that it needs to be the max of
> pageblock_order and MAX_ORDER.
> 
> Signed-off-by: Zi Yan <ziy@nvidia.com>
> ---
>  drivers/virtio/virtio_mem.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
> index a6a78685cfbe..2664dc16d0f9 100644
> --- a/drivers/virtio/virtio_mem.c
> +++ b/drivers/virtio/virtio_mem.c
> @@ -2481,8 +2481,7 @@ static int virtio_mem_init_hotplug(struct virtio_mem *vm)
>  	 * - Is required for now for alloc_contig_range() to work reliably -
>  	 *   it doesn't properly handle smaller granularity on ZONE_NORMAL.
>  	 */

Please also update this comment.
Zi Yan Jan. 14, 2022, 3:15 p.m. UTC | #2 
On 14 Jan 2022, at 8:44, David Hildenbrand wrote:

> On 05.01.22 22:47, Zi Yan wrote:
>> From: Zi Yan <ziy@nvidia.com>
>>
>> alloc_contig_range() now only needs to be aligned to pageblock_order,
>> drop virtio_mem size requirement that it needs to be the max of
>> pageblock_order and MAX_ORDER.
>>
>> Signed-off-by: Zi Yan <ziy@nvidia.com>
>> ---
>>  drivers/virtio/virtio_mem.c | 3 +--
>>  1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
>> index a6a78685cfbe..2664dc16d0f9 100644
>> --- a/drivers/virtio/virtio_mem.c
>> +++ b/drivers/virtio/virtio_mem.c
>> @@ -2481,8 +2481,7 @@ static int virtio_mem_init_hotplug(struct virtio_mem *vm)
>>  	 * - Is required for now for alloc_contig_range() to work reliably -
>>  	 *   it doesn't properly handle smaller granularity on ZONE_NORMAL.
>>  	 */
>
> Please also update this comment.

No problem. Thanks for pointing this out.


--
Best Regards,
Yan, Zi
diff mbox series

Patch

diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index a6a78685cfbe..2664dc16d0f9 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -2481,8 +2481,7 @@  static int virtio_mem_init_hotplug(struct virtio_mem *vm)
 	 * - Is required for now for alloc_contig_range() to work reliably -
 	 *   it doesn't properly handle smaller granularity on ZONE_NORMAL.
 	 */
-	sb_size = max_t(uint64_t, MAX_ORDER_NR_PAGES,
-			pageblock_nr_pages) * PAGE_SIZE;
+	sb_size = pageblock_nr_pages * PAGE_SIZE;
 	sb_size = max_t(uint64_t, vm->device_block_size, sb_size);
 
 	if (sb_size < memory_block_size_bytes() && !force_bbm) {