linux-kernel - Re: [PATCH] resource,kexec: walk_system_ram_res

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Message-ID: <ZxJTDq-PxxxIgzfv@smile.fi.intel.com>
Date: Fri, 18 Oct 2024 15:22:38 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Baoquan He <bhe@...hat.com>
Cc: Gregory Price <gourry@...rry.net>, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	bhelgaas@...gle.com, ilpo.jarvinen@...ux.intel.com,
	mika.westerberg@...ux.intel.com, ying.huang@...el.com,
	tglx@...utronix.de, takahiro.akashi@...aro.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] resource,kexec: walk_system_ram_res_rev must retain
 resource flags

On Fri, Oct 18, 2024 at 10:18:42AM +0800, Baoquan He wrote:
> HI Gregory,
> 
> On 10/17/24 at 03:03pm, Gregory Price wrote:
> > walk_system_ram_res_rev() erroneously discards resource flags when
> > passing the information to the callback.
> > 
> > This causes systems with IORESOURCE_SYSRAM_DRIVER_MANAGED memory to
> > have these resources selected during kexec to store kexec buffers
> > if that memory happens to be at placed above normal system ram.
> 
> Sorry about that. I haven't checked IORESOURCE_SYSRAM_DRIVER_MANAGED
> memory carefully, wondering if res could be set as
> 'IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY' plus
> IORESOURCE_SYSRAM_DRIVER_MANAGED in iomem_resource tree.
> 
> Anyway, the change in this patch is certainly better. Thanks.

Can we get more test cases in the respective module, please?

-- 
With Best Regards,
Andy Shevchenko