linux-kernel - Re: Performance regressions in "boot

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Date:   Tue, 13 Oct 2020 13:08:24 +0800
From:   "bhe@...hat.com" <bhe@...hat.com>
To:     Rahul Gopakumar <gopakumarr@...are.com>
Cc:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "natechancellor@...il.com" <natechancellor@...il.com>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>,
        "clang-built-linux@...glegroups.com" 
        <clang-built-linux@...glegroups.com>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        Rajender M <manir@...are.com>,
        Yiu Cho Lau <lauyiuch@...are.com>,
        Peter Jonasson <pjonasson@...are.com>,
        Venkatesh Rajaram <rajaramv@...are.com>
Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kernel

On 10/12/20 at 05:21pm, Rahul Gopakumar wrote:
> Hi Baoquan,
> 
> Attached collected dmesg logs for with and without
> commit after adding memblock=debug to kernel cmdline.

Thanks, I have got the root cause, will make a patch for your testing
soon.