From: "bhe@redhat.com" <bhe@redhat.com>
To: Rahul Gopakumar <gopakumarr@vmware.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"natechancellor@gmail.com" <natechancellor@gmail.com>,
"ndesaulniers@google.com" <ndesaulniers@google.com>,
"clang-built-linux@googlegroups.com"
<clang-built-linux@googlegroups.com>,
"rostedt@goodmis.org" <rostedt@goodmis.org>,
Rajender M <manir@vmware.com>, Yiu Cho Lau <lauyiuch@vmware.com>,
Peter Jonasson <pjonasson@vmware.com>,
Venkatesh Rajaram <rajaramv@vmware.com>
Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kernel
Date: Sun, 22 Nov 2020 09:08:44 +0800 [thread overview]
Message-ID: <20201122010844.GR8486@MiWiFi-R3L-srv> (raw)
In-Reply-To: <DM6PR05MB52920B2D4267AD7D073D3C36A4FF0@DM6PR05MB5292.namprd05.prod.outlook.com>
On 11/20/20 at 03:11am, Rahul Gopakumar wrote:
> Hi Baoquan,
>
> To which commit should we apply the draft patch. We tried applying
> the patch to the commit 3e4fb4346c781068610d03c12b16c0cfb0fd24a3
> (the one we used for applying the previous patch) but it fails.
I tested on 5.10-rc3+. You can append below change to the old patch in
your testing kernel.
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index fa6076e1a840..5e5b74e88d69 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -448,6 +448,8 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
if (end_pfn < pgdat_end_pfn(NODE_DATA(nid)))
return false;
+ if (NODE_DATA(nid)->first_deferred_pfn != ULONG_MAX)
+ return true;
/*
* We start only with one section of pages, more pages are added as
* needed until the rest of deferred pages are initialized.
next prev parent reply other threads:[~2020-11-22 1:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-09 13:15 Performance regressions in "boot_time" tests in Linux 5.8 Kernel Rahul Gopakumar
2020-10-10 6:11 ` bhe
2020-10-12 17:21 ` Rahul Gopakumar
2020-10-13 5:08 ` bhe
2020-10-13 13:17 ` bhe
2020-10-20 13:45 ` Rahul Gopakumar
2020-10-20 15:18 ` bhe
2020-10-20 15:26 ` Rahul Gopakumar
2020-10-22 4:04 ` bhe
2020-10-22 17:21 ` Rahul Gopakumar
2020-11-02 14:15 ` Rahul Gopakumar
2020-11-02 14:30 ` bhe
2020-11-03 12:34 ` Rahul Gopakumar
2020-11-03 14:03 ` bhe
2020-11-12 14:51 ` bhe
2020-11-20 3:11 ` Rahul Gopakumar
2020-11-22 1:08 ` bhe [this message]
2020-11-24 15:03 ` Rahul Gopakumar
2020-11-30 16:55 ` Mike Rapoport
2020-12-11 16:16 ` Rahul Gopakumar
2020-12-13 15:15 ` bhe
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