From: Wei Yang <richard.weiyang@linux.alibaba.com>
To: mike.kravetz@oracle.com, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: [PATCH 06/10] mm/hugetlb: remove redundant huge_pte_alloc() in hugetlb_fault()
Date: Fri, 7 Aug 2020 17:12:47 +0800 [thread overview]
Message-ID: <20200807091251.12129-7-richard.weiyang@linux.alibaba.com> (raw)
In-Reply-To: <20200807091251.12129-1-richard.weiyang@linux.alibaba.com>
Before proper processing, huge_pte_alloc() would be called
un-conditionally. It is not necessary to do this when ptep is NULL.
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
---
mm/hugetlb.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f5f04e89000d..fb09e5a83c39 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4534,10 +4534,6 @@ vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
} else if (unlikely(is_hugetlb_entry_hwpoisoned(entry)))
return VM_FAULT_HWPOISON_LARGE |
VM_FAULT_SET_HINDEX(hstate_index(h));
- } else {
- ptep = huge_pte_alloc(mm, haddr, huge_page_size(h));
- if (!ptep)
- return VM_FAULT_OOM;
}
/*
--
2.20.1 (Apple Git-117)
next prev parent reply other threads:[~2020-08-07 9:13 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-07 9:12 [PATCH 00/10] mm/hugetlb: code refine and simplification Wei Yang
2020-08-07 9:12 ` [PATCH 01/10] mm/hugetlb: not necessary to coalesce regions recursively Wei Yang
2020-08-07 12:47 ` Baoquan He
2020-08-10 20:22 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 02/10] mm/hugetlb: make sure to get NULL when list is empty Wei Yang
2020-08-07 12:49 ` Baoquan He
2020-08-07 14:28 ` Wei Yang
2020-08-10 0:57 ` Baoquan He
2020-08-10 20:28 ` Mike Kravetz
2020-08-10 23:05 ` Wei Yang
2020-08-07 9:12 ` [PATCH 03/10] mm/hugetlb: use list_splice to merge two list at once Wei Yang
2020-08-07 12:53 ` Baoquan He
2020-08-10 21:07 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 04/10] mm/hugetlb: count file_region to be added when regions_needed != NULL Wei Yang
2020-08-07 12:54 ` Baoquan He
2020-08-10 21:46 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 05/10] mm/hugetlb: remove the redundant check on non_swap_entry() Wei Yang
2020-08-07 12:55 ` Baoquan He
2020-08-07 14:28 ` Wei Yang
2020-08-07 9:12 ` Wei Yang [this message]
2020-08-07 12:59 ` [PATCH 06/10] mm/hugetlb: remove redundant huge_pte_alloc() in hugetlb_fault() Baoquan He
2020-08-10 22:00 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 07/10] mm/hugetlb: a page from buddy is not on any list Wei Yang
2020-08-07 13:06 ` Baoquan He
2020-08-10 22:25 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 08/10] mm/hugetlb: return non-isolated page in the loop instead of break and check Wei Yang
2020-08-07 13:09 ` Baoquan He
2020-08-07 14:32 ` Wei Yang
2020-08-10 22:55 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 09/10] mm/hugetlb: narrow the hugetlb_lock protection area during preparing huge page Wei Yang
2020-08-07 13:12 ` Baoquan He
2020-08-10 23:02 ` Mike Kravetz
2020-08-07 9:12 ` [PATCH 10/10] mm/hugetlb: not necessary to abuse temporary page to workaround the nasty free_huge_page Wei Yang
2020-08-10 2:17 ` Baoquan He
2020-08-11 0:19 ` Mike Kravetz
2020-08-11 1:51 ` Baoquan He
2020-08-11 6:54 ` Michal Hocko
2020-08-11 21:43 ` Mike Kravetz
2020-08-11 23:19 ` Wei Yang
2020-08-11 23:25 ` Mike Kravetz
2020-08-12 5:40 ` Baoquan He
2020-08-13 11:46 ` Michal Hocko
2020-08-17 3:04 ` Wei Yang
2020-08-11 23:55 ` Baoquan He
2020-08-07 22:25 ` [PATCH 00/10] mm/hugetlb: code refine and simplification Mike Kravetz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200807091251.12129-7-richard.weiyang@linux.alibaba.com \
--to=richard.weiyang@linux.alibaba.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mike.kravetz@oracle.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).