linux-kernel - Re: [PATCH v4] xen/balloon: add late_initcall

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Message-ID: <YYQI6NQ8eY9XtSI4@mail-itl>
Date:   Thu, 4 Nov 2021 17:23:04 +0100
From:   Marek Marczykowski-Górecki 
        <marmarek@...isiblethingslab.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jonathan Corbet <corbet@....net>,
        Stefano Stabellini <sstabellini@...nel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH v4] xen/balloon: add late_initcall_sync() for initial
 ballooning done

On Thu, Nov 04, 2021 at 11:55:34AM -0400, Boris Ostrovsky wrote:
> This appears to have noticeable effect on boot time (and boot experience in general).

Yes, this is kind of intentional. It avoids killing the domain ("out of
PoD memory") for the price of increased boot time. I still wonder why it
wasn't an issue before, although it could just be a race that was less
likely to loose before.

You can find some analysis of mine here:
https://lore.kernel.org/xen-devel/YXFxKC4shCATB913@mail-itl/

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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