From: Pavel Machek <pavel@ucw.cz>
To: Adrian Catangiu <acatan@amazon.com>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
qemu-devel@nongnu.org, kvm@vger.kernel.org,
linux-s390@vger.kernel.org, gregkh@linuxfoundation.org,
graf@amazon.com, arnd@arndb.de, ebiederm@xmission.com,
rppt@kernel.org, 0x7f454c46@gmail.com, borntraeger@de.ibm.com,
Jason@zx2c4.com, jannh@google.com, w@1wt.eu, colmmacc@amazon.com,
luto@kernel.org, tytso@mit.edu, ebiggers@kernel.org,
dwmw@amazon.co.uk, bonzini@gnu.org, sblbir@amazon.com,
raduweis@amazon.com, corbet@lwn.net, mst@redhat.com,
mhocko@kernel.org, rafael@kernel.org, mpe@ellerman.id.au,
areber@redhat.com, ovzxemul@gmail.com, avagin@gmail.com,
ptikhomirov@virtuozzo.com, gil@azul.com, asmehra@redhat.com,
dgunigun@redhat.com, vijaysun@ca.ibm.com, oridgar@gmail.com,
ghammer@redhat.com
Subject: Re: [PATCH v4 1/2] drivers/misc: sysgenid: add system generation id driver
Date: Wed, 27 Jan 2021 23:15:05 +0100 [thread overview]
Message-ID: <20210127221505.GB24799@amd> (raw)
In-Reply-To: <1610453760-13812-2-git-send-email-acatan@amazon.com>
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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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WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz>
To: Adrian Catangiu <acatan@amazon.com>
Cc: Jason@zx2c4.com, dgunigun@redhat.com, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, ghammer@redhat.com,
vijaysun@ca.ibm.com, 0x7f454c46@gmail.com, qemu-devel@nongnu.org,
mhocko@kernel.org, oridgar@gmail.com, avagin@gmail.com,
ptikhomirov@virtuozzo.com, linux-s390@vger.kernel.org,
corbet@lwn.net, mpe@ellerman.id.au, mst@redhat.com,
ebiggers@kernel.org, borntraeger@de.ibm.com, sblbir@amazon.com,
bonzini@gnu.org, arnd@arndb.de, jannh@google.com,
raduweis@amazon.com, asmehra@redhat.com, graf@amazon.com,
rppt@kernel.org, luto@kernel.org, gil@azul.com,
colmmacc@amazon.com, tytso@mit.edu, gregkh@linuxfoundation.org,
areber@redhat.com, linux-kernel@vger.kernel.org,
ebiederm@xmission.com, ovzxemul@gmail.com, rafael@kernel.org,
w@1wt.eu, dwmw@amazon.co.uk
Subject: Re: [PATCH v4 1/2] drivers/misc: sysgenid: add system generation id driver
Date: Wed, 27 Jan 2021 23:15:05 +0100 [thread overview]
Message-ID: <20210127221505.GB24799@amd> (raw)
In-Reply-To: <1610453760-13812-2-git-send-email-acatan@amazon.com>
[-- Attachment #1: Type: text/plain, Size: 425 bytes --]
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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next prev parent reply other threads:[~2021-01-27 22:16 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 12:15 [PATCH v4 0/2] System Generation ID driver and VMGENID backend Adrian Catangiu
2021-01-12 12:15 ` Adrian Catangiu via
2021-01-12 12:15 ` Adrian Catangiu
2021-01-12 12:15 ` [PATCH v4 1/2] drivers/misc: sysgenid: add system generation id driver Adrian Catangiu
2021-01-12 12:15 ` Adrian Catangiu via
2021-01-12 12:15 ` Adrian Catangiu
2021-01-12 13:08 ` Greg KH
2021-01-12 13:08 ` Greg KH
2021-01-21 9:54 ` Catangiu, Adrian Costin
2021-01-21 9:54 ` acatan--- via
2021-01-12 13:08 ` Michael S. Tsirkin
2021-01-12 13:08 ` Michael S. Tsirkin
2021-01-21 12:48 ` Catangiu, Adrian Costin
2021-01-21 12:48 ` acatan--- via
2021-01-19 22:34 ` Randy Dunlap
2021-01-19 22:34 ` Randy Dunlap
2021-01-27 22:15 ` Pavel Machek [this message]
2021-01-27 22:15 ` Pavel Machek
2021-02-02 14:32 ` Michael S. Tsirkin
2021-02-02 14:32 ` Michael S. Tsirkin
2021-01-12 12:16 ` [PATCH v4 2/2] drivers/virt: vmgenid: add vm " Adrian Catangiu
2021-01-12 12:16 ` Adrian Catangiu via
2021-01-12 12:16 ` Adrian Catangiu
2021-01-12 12:48 ` [PATCH v4 0/2] System Generation ID driver and VMGENID backend Michael S. Tsirkin
2021-01-12 12:48 ` Michael S. Tsirkin
2021-01-21 10:28 ` Catangiu, Adrian Costin
2021-01-21 10:28 ` acatan--- via
2021-01-27 12:47 ` Michael S. Tsirkin
2021-01-27 12:47 ` Michael S. Tsirkin
2021-01-28 12:58 ` Alexander Graf
2021-01-28 12:58 ` graf--- via
2021-02-02 14:34 ` Michael S. Tsirkin
2021-02-02 14:34 ` Michael S. Tsirkin
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