From: Alexander Graf <graf@amazon.de>
To: Babis Chalios <bchalios@amazon.es>, Theodore Ts'o <tytso@mit.edu>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
<linux-kernel@vger.kernel.org>
Cc: <mzxreary@0pointer.de>, <xmarcalx@amazon.co.uk>,
Greg KH <gregkh@linuxfoundation.org>
Subject: Re: [PATCH 1/1] vmgenid: emit uevent when VMGENID updates
Date: Mon, 19 Jun 2023 11:14:06 +0200 [thread overview]
Message-ID: <38b2d1b4-9a26-c6a3-cf8b-af5b3dcf5a9b@amazon.de> (raw)
In-Reply-To: <20230531095119.11202-2-bchalios@amazon.es>
On 31.05.23 11:51, Babis Chalios wrote:
> We receive an ACPI notification every time the VM Generation ID changes
> and use the new ID as fresh randomness added to the entropy pool. This
> commits emits a uevent every time we receive the ACPI notification, as a
> means to notify the user space that it now is in a new VM.
>
> Signed-off-by: Babis Chalios <bchalios@amazon.es>
Thanks Babis! Super simple, yet very effective way to notify system
software that it may need to adopt to a new environment. I know that the
systemd folks are super interested in that to for example regenerate
randomly generated MAC addresses after a clone operation.
Reviewed-by: Alexander Graf <graf@amazon.com>
Alex
Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879
next prev parent reply other threads:[~2023-06-19 9:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-31 9:51 [PATCH 0/1] User space notifications about VM cloning Babis Chalios
2023-05-31 9:51 ` [PATCH 1/1] vmgenid: emit uevent when VMGENID updates Babis Chalios
2023-06-19 9:14 ` Alexander Graf [this message]
2023-06-19 15:48 ` Lennart Poettering
2023-06-19 20:30 ` Jason A. Donenfeld
2023-06-19 20:37 ` Alexander Graf
2023-06-20 10:27 ` Babis Chalios
2023-06-20 11:28 ` Lennart Poettering
2023-11-14 12:51 ` Alexander Graf
2023-06-16 15:07 ` [PATCH 0/1] User space notifications about VM cloning Babis Chalios
2023-06-28 11:13 ` Alexander Graf
2023-06-28 11:22 ` Greg KH
2023-06-28 11:36 ` Jason A. Donenfeld
2023-06-28 11:47 ` Greg KH
2023-06-28 16:08 ` Greg KH
2023-06-28 16:27 ` Jason A. Donenfeld
2023-06-28 16:53 ` Amit Shah
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