Unverified Commit 8cf975b0 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!6905 v2 arm64: mmap: disable align larger anonymous mappings on THP boundaries 

Merge Pull Request from: @ci-robot 
 
PR sync from: Ze Zuo <zuoze1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/3GTFTZIDJVWPBVTCUKJITFFCRUJAH3ZG/ 
 
https://gitee.com/openeuler/kernel/issues/I9N68A 
 
Link:https://gitee.com/openeuler/kernel/pulls/6905

 

Reviewed-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
parents e33d399c bb713c2a

mm/mmap.c

+2 −1
Original line number Diff line number Diff line
@@ -1856,7 +1856,8 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, 
		 * so use shmem's get_unmapped_area in case it can be huge.

		 */

		get_area = shmem_get_unmapped_area;

	} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {

	} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&

		   !IS_ENABLED(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)) {

		/* Ensures that larger anonymous mappings are THP aligned. */

		get_area = thp_get_unmapped_area;

	}