linux-kernel - Re: [PATCH v4 1/2] drivers/misc: sysgenid: add system generation id driver

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Message-ID: <20210127221505.GB24799@amd>
Date:   Wed, 27 Jan 2021 23:15:05 +0100
From:   Pavel Machek <pavel@....cz>
To:     Adrian Catangiu <acatan@...zon.com>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        qemu-devel@...gnu.org, kvm@...r.kernel.org,
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Subject: Re: [PATCH v4 1/2] drivers/misc: sysgenid: add system generation id
 driver

Hi!

> - Solution
> 
> The System Generation ID is a simple concept meant to alleviate the
> issue by providing a monotonically increasing u32 counter that changes
> each time the VM or container is restored from a snapshot.

I'd make it u64.

But as people explained, this has race problems that may be impossible
to solve?

Best regards,
								Pavel
								
-- 
http://www.livejournal.com/~pavelmachek

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