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Commit 220cd058 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Alasdair G Kergon
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dm: use __GFP_HIGHMEM in __vmalloc 



Use __GFP_HIGHMEM in __vmalloc.

Pages allocated with __vmalloc can be allocated in high memory that is not
directly mapped to kernel space, so use __GFP_HIGHMEM just like vmalloc
does. This patch reduces memory pressure slightly because pages can be
allocated in the high zone.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent b1bf2de0

drivers/md/dm-bufio.c

+1 −1
Original line number Diff line number Diff line
@@ -349,7 +349,7 @@ static void *alloc_buffer_data(struct dm_bufio_client *c, gfp_t gfp_mask, 
	if (gfp_mask & __GFP_NORETRY)

		noio_flag = memalloc_noio_save();



	ptr = __vmalloc(c->block_size, gfp_mask, PAGE_KERNEL);

	ptr = __vmalloc(c->block_size, gfp_mask | __GFP_HIGHMEM, PAGE_KERNEL);



	if (gfp_mask & __GFP_NORETRY)

		memalloc_noio_restore(noio_flag);

drivers/md/dm-ioctl.c

+1 −1
Original line number Diff line number Diff line
@@ -1646,7 +1646,7 @@ static int copy_params(struct dm_ioctl __user *user, struct dm_ioctl *param_kern 
	if (!dmi) {

		unsigned noio_flag;

		noio_flag = memalloc_noio_save();

		dmi = __vmalloc(param_kernel->data_size, GFP_NOIO | __GFP_REPEAT | __GFP_HIGH, PAGE_KERNEL);

		dmi = __vmalloc(param_kernel->data_size, GFP_NOIO | __GFP_REPEAT | __GFP_HIGH | __GFP_HIGHMEM, PAGE_KERNEL);

		memalloc_noio_restore(noio_flag);

		if (dmi)

			*param_flags |= DM_PARAMS_VMALLOC;