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charset="GB2312" Content-Transfer-Encoding: base64 SGkgQW5kcmV3LA0KDQpJIGZvdW5kIHRoYXQgYSBmaXggaXMgcmVxdWlyZWQgZm9yIHRoaXMgc3Vi bWlzc2lvbiBpbiBicmFuY2ggNi42Lg0KaHR0cHM6Ly9naXQua2VybmVsLm9yZy9wdWIvc2NtL2xp bnV4L2tlcm5lbC9naXQvc3RhYmxlL2xpbnV4LmdpdC9jb21taXQvP2lkPWExM2IyYjliMGIwYjA0 NjEyYzdkODFlM2IzZGZiNDg1YzVmN2FiYzMgDQoNClJlZ2FyZGluZyB0aGUgZGlmZmVyZW5jZSBi ZXR3ZWVuIGJyYW5jaGVzIDYuNiBhbmQgNi4xMiwgaW4gYnJhbmNoIDYuNiwgbW1hcF9yZWFkX2xv Y2soKSBhbmQgbW1hcF9yZWFkX3VubG9jaygpIGFyZSBjYWxsZWQgb3V0c2lkZSB0aGUgbWlncmF0 ZV90b19ub2RlKCkgZnVuY3Rpb24uIA0KVGhlcmVmb3JlLCBtbWFwX3JlYWRfdW5sb2NrKG1tKSBz aG91bGQgbm90IGJlIGludm9rZWQgaW5zaWRlIG1pZ3JhdGVfdG9fbm9kZSgpOyBvdGhlcndpc2Us IGl0IHdvdWxkIHJlc3VsdCBpbiBhIGRvdWJsZSB1bmxvY2sgb2YgdGhlIG1tLg0KZGlmZiAtLWdp dCBhL21tL21lbXBvbGljeS5jIGIvbW0vbWVtcG9saWN5LmMNCmluZGV4IDU0ZjFiNzhkMWIyYzBm Li45NGM3NGM1OTRkMTAyYSAxMDA2NDQNCi0tLSBhL21tL21lbXBvbGljeS5jDQorKysgYi9tbS9t ZW1wb2xpY3kuYw0KQEAgLTEwNzEsNiArMTA3MSwxMCBAQCBzdGF0aWMgbG9uZyBtaWdyYXRlX3Rv X25vZGUoc3RydWN0IG1tX3N0cnVjdCAqbW0sIGludCBzb3VyY2UsIGludCBkZXN0LA0KVk1fQlVH X09OKCEoZmxhZ3MgJiAoTVBPTF9NRl9NT1ZFIHwgTVBPTF9NRl9NT1ZFX0FMTCkpKTsNCnZtYSA9 IGZpbmRfdm1hKG1tLCAwKTsNCisgaWYgKHVubGlrZWx5KCF2bWEpKSB7DQorIG1tYXBfcmVhZF91 bmxvY2sobW0pOyAvLyB0aGlzIGxpbmUgc2hvdWxkIGJlIGRlbGV0ZWQNCisgcmV0dXJuIDA7DQor IH0NCi8qDQoqIFRoaXMgZG9lcyBub3QgbWlncmF0ZSB0aGUgcmFuZ2UsIGJ1dCBpc29sYXRlcyBh bGwgcGFnZXMgdGhhdA0KDQoNCg0KQmVzdCBSZWdhcmRzLA0KTGkgWWluZyAsIExpZ2h0IFN0b3Jh Z2UgR3JvdXAuICBTZW5pb3IgRW1iZWRkZWQgU29mdHdhcmUgRW5naW5lZXINClRlbDogLaO7IEZh eDogLQ0KTW9iaWxlOiArODYtMTU2NTE5NjM5ODENCmxpeWluZzNAc3VuZ3Jvd3Bvd2VyLmNvbSAN Cnd3dy5zdW5ncm93cG93ZXIuY29tDQpTVU5HUk9XIFBPV0VSIFNVUFBMWSBDby4sIEx0ZC4gDQpB ZGQ6IE5vLjE2OTkgWGl5b3UgUmQuLCBOZXcgJiBIaWdoIFRlY2hub2xvZ3kgSW5kdXN0cmlhbCBE ZXZlbG9wbWVudCBab25lLCBIZWZlaSwgUC4gUi4gQ2hpbmEuLCAyMzAwODgNCg== ------=_001_NextPart311561431666_=---- Content-Type: text/html; charset="GB2312" Content-Transfer-Encoding: quoted-printable =0A
<= /span>Hi Andrew,

I found that a fix is required for this submission in branch 6.= 6.

<= span style=3D"color: rgb(15, 17, 21); font-family: quote-cjk-patch, Inter,= system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Robot= o, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue&= quot;, sans-serif; font-size: 16px;">Regarding the difference between bran= ches 6.6 and 6.12, in branch 6.6, mmap_read_lock() and mmap_read_unlock()=  are called outside the migrate_to_node() function. 
Therefore, mmap_read_unlock(mm)migrate_to_node(); otherwise, it would result in a double unlock of the = ;mm.
diff --git a/mm/me= mpolicy.c b/mm/mempolicy.c
index 54f1b78d1b2c0f..94c74c594d102a 100644<= br>--- a/mm/mempolicy.c<= br>+++ b/mm/mempolicy.c<= /div>
@@ -1071,6 +1071,10 @@ static long migrate_to_= node(struct mm_struct *mm, int source, int dest,
VM_BUG_ON(!(flags & (MPOL_MF_MOVE |= MPOL_MF_MOVE_ALL)));
vma =3D find_vma(mm, 0= );
+ if (unlikely(!vma)) {
+ mmap_read_unlock(mm); // th= is line should be deleted
+ return 0;
+ }
/*=
* This does not migrate the range, but iso= lates all pages that
=0A

=0A
=0A=0A=0A=0A

Best Regards,

Li Ying ,= Light Storage Group.  Senior Embedded Software Engineer

Tel: -=A3=BB Fax: -

Mobile: +86-= 15651963981

liying3@sungrowpower.com 

www.sungrowpower.com

S= UNGROW POWER SUPPLY Co., Ltd. 

Add: No.169= 9 Xiyou Rd., New & High Technology Industrial Development Zone, Hefei,= P. R. China., 230088

<= !--EndFragment-->

=0A ------=_001_NextPart311561431666_=------ akpm@linux-foundation.org;linux-mm@kvack.org;linux-kernel@vger.kernel.org;victor7q@163.com;