linux-kernel - Re: [PATCH] x86/e820: Fix handling of subpage regions when calculating nosave ranges

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Message-ID: <2025040532-salvage-armadillo-77b6@gregkh>
Date: Sat, 5 Apr 2025 08:40:51 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: msizanoen <msizanoen@...labs.xyz>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	linux-kernel@...r.kernel.org, Roberto Ricci <io@...icci.it>,
	stable@...r.kernel.org
Subject: Re: [PATCH] x86/e820: Fix handling of subpage regions when
 calculating nosave ranges

On Sat, Apr 05, 2025 at 10:09:24AM +0700, msizanoen wrote:
> Handle better cases where there might be non-page-aligned RAM e820
> regions so we don't end up marking kernel memory as nosave.
> 
> This also simplifies the calculation of nosave ranges by treating
> non-RAM regions as holes.
> 
> Fixes: e5540f875404 ("x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names")
> Tested-by: Roberto Ricci <io@...icci.it>
> Reported-by: Roberto Ricci <io@...icci.it>
> Closes: https://lore.kernel.org/all/Z4WFjBVHpndct7br@desktop0a/
> Signed-off-by: msizanoen <msizanoen@...labs.xyz>

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