linux-kernel - RE: kexec reports "Cannot get kernel _text symbol address" on arm64 platform

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Message-ID: <MN0PR12MB59532ABFAF131AC84F36B73FB71CA@MN0PR12MB5953.namprd12.prod.outlook.com>
Date:   Wed, 23 Aug 2023 19:09:16 +0000
From:   "Pandey, Radhey Shyam" <radhey.shyam.pandey@....com>
To:     Alexander Kamensky <alexander.kamensky42@...il.com>
CC:     "bhe@...hat.com" <bhe@...hat.com>,
        "piliu@...hat.com" <piliu@...hat.com>,
        "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Sarangi, Anirudha" <anirudha.sarangi@....com>
Subject: RE: kexec reports "Cannot get kernel _text symbol address" on arm64
 platform

> -----Original Message-----
> From: Alexander Kamensky <alexander.kamensky42@...il.com>
> Sent: Tuesday, August 22, 2023 9:24 AM
> To: Pandey, Radhey Shyam <radhey.shyam.pandey@....com>
> Cc: bhe@...hat.com; piliu@...hat.com; kexec@...ts.infradead.org; linux-
> kernel@...r.kernel.org; Sarangi, Anirudha <anirudha.sarangi@....com>
> Subject: Re: kexec reports "Cannot get kernel _text symbol address" on
> arm64 platform
> 
> Hi All,
> 
> Sorry for the top post, but I believe that I might have posted a fix for this
> issue a couple days ago.
> 
> Please check and see if it helps
> https://lore.kernel.org/kexec/20230819191119.975299-1-
> alexander.kamensky42@...il.com/T/#u
> 
> Explanation for the issue I observed with a similar secondary kernel
> traceback on arm64 is in the commit message.

I fetched latest kexec sources (777ca453ca69e46f7376b07ba6727bd261ec97ef)
and applied above patch, a bit improved but still vmcore size is huge.

/ # ls -lrth /proc/vmcore 
-r--------    1 root     root       15.5G Aug 23 18:55 /proc/vmcore

Thanks,
Radhey