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From: Michal Hocko <mhocko@kernel.org>
To: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Michal Hocko <mhocko@suse.com>, Shaohua Li <shli@kernel.org>,
	Mikulas Patocka <mpatocka@redhat.com>
Subject: [PATCH 17/19] dm: get rid of superfluous gfp flags
Date: Mon, 11 Apr 2016 13:08:10 +0200	[thread overview]
Message-ID: <1460372892-8157-18-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1460372892-8157-1-git-send-email-mhocko@kernel.org>

From: Michal Hocko <mhocko@suse.com>

copy_params seems to be little bit confused about which allocation flags
to use. It enforces GFP_NOIO even though it uses
memalloc_noio_{save,restore} which enforces GFP_NOIO at the page
allocator level automatically (via memalloc_noio_flags). It also
uses __GFP_REPEAT for the __vmalloc request which doesn't make much
sense either because vmalloc doesn't rely on costly high order
allocations.

Cc: Shaohua Li <shli@kernel.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 drivers/md/dm-ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 2adf81d81fca..dfe629a294e1 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1723,7 +1723,7 @@ 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 | __GFP_HIGHMEM, PAGE_KERNEL);
+		dmi = __vmalloc(param_kernel->data_size, __GFP_HIGH | __GFP_HIGHMEM, PAGE_KERNEL);
 		memalloc_noio_restore(noio_flag);
 		if (dmi)
 			*param_flags |= DM_PARAMS_VMALLOC;
-- 
2.8.0.rc3

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  parent reply	other threads:[~2016-04-11 11:09 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-11 11:07 [PATCH 0/19] get rid of superfluous __GFP_REPORT Michal Hocko
2016-04-11 11:07 ` [PATCH 01/19] tree wide: get rid of __GFP_REPEAT for order-0 allocations part I Michal Hocko
2016-04-14 19:56   ` David Rientjes
2016-04-15  7:44     ` Michal Hocko
2016-04-11 11:07 ` [PATCH 02/19] x86: get rid of superfluous __GFP_REPEAT Michal Hocko
2016-04-11 11:07 ` [PATCH 03/19] x86/efi: " Michal Hocko
2016-04-12 15:53   ` Matt Fleming
2016-04-11 11:07 ` [PATCH 04/19] arm: " Michal Hocko
2016-04-11 11:07 ` [PATCH 05/19] arm64: " Michal Hocko
2016-04-11 15:49   ` Will Deacon
2016-04-11 11:07 ` [PATCH 06/19] arc: " Michal Hocko
2016-04-11 14:23   ` Vineet Gupta
2016-04-11 11:08 ` [PATCH 07/19] mips: " Michal Hocko
2016-04-11 11:08 ` [PATCH 08/19] nios2: " Michal Hocko
2016-04-11 11:08 ` [PATCH 09/19] parisc: " Michal Hocko
2016-04-11 11:08 ` [PATCH 10/19] score: " Michal Hocko
2016-04-11 11:08 ` [PATCH 11/19] powerpc: " Michal Hocko
2016-04-11 11:08 ` [PATCH 12/19] sparc: " Michal Hocko
2016-04-11 11:08 ` [PATCH 13/19] s390: " Michal Hocko
2016-04-11 11:28   ` Cornelia Huck
2016-04-11 12:47     ` Heiko Carstens
2016-04-11 11:08 ` [PATCH 14/19] sh: " Michal Hocko
2016-04-11 11:08 ` [PATCH 15/19] tile: " Michal Hocko
2016-04-11 11:08 ` [PATCH 16/19] unicore32: " Michal Hocko
2016-04-11 11:08 ` Michal Hocko [this message]
2016-04-15 12:29   ` [PATCH 17/19] dm: get rid of superfluous gfp flags Mikulas Patocka
2016-04-15 13:08     ` Michal Hocko
2016-04-15 18:41       ` Mikulas Patocka
2016-04-16 20:31         ` Michal Hocko
2016-04-22 12:47           ` Michal Hocko
2016-04-26 17:20             ` Mikulas Patocka
2016-04-27  8:35               ` Michal Hocko
2016-04-11 11:08 ` [PATCH 18/19] crypto: get rid of superfluous __GFP_REPEAT Michal Hocko
2016-04-14  6:27   ` Herbert Xu
2016-04-14  7:02     ` Michal Hocko
2016-04-14  8:16       ` Herbert Xu
2016-04-14  8:51   ` [PATCH resend] " Michal Hocko
2016-04-15 14:37     ` Herbert Xu
2016-04-11 11:08 ` [PATCH 19/19] jbd2: " Michal Hocko
2016-04-13 11:21 ` CC in git cover letter vs patches (was Re: [PATCH 0/19] get rid of superfluous __GFP_REPORT) Vineet Gupta
2016-04-13 13:33   ` Michal Hocko

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