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Date:      Sun, 12 Apr 2026 18:40:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 292570] [virtio] virtio-balloon does not balloon correctly
Message-ID:  <bug-292570-27103-ujj0eK6zKq@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-292570-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292570

--- Comment #3 from lysfjord.daniel@smokepit.net ---
(In reply to Xiangzhe from comment #2)

It *seems* to be a step in the right direction.. The allocation shrinks by 1MiB
every apx. 5 seconds now, and it seems to be going until the target set.

I guess dev.vtballoon.0.current and dev.vtballoon.0.desired are in some other
unit than KiB.. it's moving in steps of 256 per time virt-manager say it has
adjusted the current allocation with 1MiB, pointing me to it being in 4k pages?

Since your code has
#define VTBALLOON_PAGES_PER_REQUEST     256
I guess the reasoning is sound..

No idea why it only request changes once every 5 seconds, or thereabouts, but
at least it tries to work now:)

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