linux-kernel - [PATCH] mm/vmalloc: add missing __GFP

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Message-ID: <20210726032333.3404164-1-chenwandun@huawei.com>
Date:   Mon, 26 Jul 2021 11:23:33 +0800
From:   Chen Wandun <chenwandun@...wei.com>
To:     <akpm@...ux-foundation.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <wangkefeng.wang@...wei.com>,
        <weiyongjun1@...wei.com>
CC:     Chen Wandun <chenwandun@...wei.com>
Subject: [PATCH] mm/vmalloc: add missing __GFP_HIGHMEM flag for vmalloc

struct page array can also be allocated in highmem during vmalloc,
that will ease the low memory stress in 32bit system.

Fixes: f255935b9767 ("mm: cleanup the gfp_mask handling in __vmalloc_area_node")
Signed-off-by: Chen Wandun <chenwandun@...wei.com>
---
 mm/vmalloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 3824dc16ce1c..8d9b0b08a6dc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2885,7 +2885,8 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
 
 	/* Please note that the recursion is strictly bounded. */
 	if (array_size > PAGE_SIZE) {
-		area->pages = __vmalloc_node(array_size, 1, nested_gfp, node,
+		area->pages = __vmalloc_node(array_size, 1,
+					nested_gfp | __GFP_HIGHMEM, node,
 					area->caller);
 	} else {
 		area->pages = kmalloc_node(array_size, nested_gfp, node);
-- 
2.25.1