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SubjectRe: [PATCH v1] hv_balloon: disable warning when floor reached
Am Tue, 13 Oct 2020 11:19:21 +0200
schrieb Olaf Hering <olaf@aepfle.de>:

> A message is generated every 5 minutes. Unclear why this remained unnoticed since at least v5.3. I have added debug to my distro kernel to see what the involved variable values are. More info later today.

The actual values for avail_pages, num_pages and floor are shown below.
The VM has min 512M, startup 1024M. If I interpret it correctly, the host requests to balloon down 83MB, while the VM has ~596MB assigned according to the GUI. free still reports 878MB.

Olaf

[ 66.917948] hv_balloon: Max. dynamic memory size: 2222 MB
[ 331.839393] hv_balloon: Balloon request will be partially fulfilled. (65875 32768 54728) Balloon floor reached.
[ 331.847451] hv_balloon: Balloon request will be partially fulfilled. (54745 21621 54728) Balloon floor reached.
[ 331.848480] hv_balloon: Balloon request will be partially fulfilled. (54745 21604 54728) Balloon floor reached.
[ 331.849465] hv_balloon: Balloon request will be partially fulfilled. (54745 21587 54728) Balloon floor reached.
[ 331.850463] hv_balloon: Balloon request will be partially fulfilled. (54745 21570 54728) Balloon floor reached.
[ 331.851393] hv_balloon: Balloon request will be partially fulfilled. (54682 21553 54728) Balloon floor reached.
[ 631.814538] hv_balloon: Balloon request will be partially fulfilled. (54801 21553 54728) Balloon floor reached.
[ 631.819084] hv_balloon: Balloon request will be partially fulfilled. (54801 21480 54728) Balloon floor reached.
[ 631.823487] hv_balloon: Balloon request will be partially fulfilled. (54738 21407 54728) Balloon floor reached.
[ 631.825832] hv_balloon: Balloon request will be partially fulfilled. (54738 21397 54728) Balloon floor reached.
[ 631.827988] hv_balloon: Balloon request will be partially fulfilled. (54738 21387 54728) Balloon floor reached.
[ 631.830111] hv_balloon: Balloon request will be partially fulfilled. (54738 21377 54728) Balloon floor reached.
[ 931.814649] hv_balloon: Balloon request will be partially fulfilled. (54406 21367 54728) Balloon floor reached.
[ 1231.829087] hv_balloon: Balloon request will be partially fulfilled. (54408 21367 54728) Balloon floor reached.
[ 1531.859374] hv_balloon: Balloon request will be partially fulfilled. (54416 21367 54728) Balloon floor reached.
[ 1831.874813] hv_balloon: Balloon request will be partially fulfilled. (54408 21367 54728) Balloon floor reached.
[ 2131.878262] hv_balloon: Balloon request will be partially fulfilled. (54672 21367 54728) Balloon floor reached.
[ 2431.895144] hv_balloon: Balloon request will be partially fulfilled. (54532 21367 54728) Balloon floor reached.
[ 2731.916792] hv_balloon: Balloon request will be partially fulfilled. (54609 21367 54728) Balloon floor reached.
[ 3031.922862] hv_balloon: Balloon request will be partially fulfilled. (54597 21367 54728) Balloon floor reached.
[ 3331.949145] hv_balloon: Balloon request will be partially fulfilled. (54615 21367 54728) Balloon floor reached.
[ 3631.957564] hv_balloon: Balloon request will be partially fulfilled. (54540 21367 54728) Balloon floor reached.
[ 3931.969477] hv_balloon: Balloon request will be partially fulfilled. (53057 21367 54728) Balloon floor reached.
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