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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:24:58 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:27:06 +0000 |
| commit | 33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch) | |
| tree | 406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1426092 | |
| parent | adedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff) | |
| download | qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip | |
add launchpad bug reports without comments
Diffstat (limited to 'results/scraper/launchpad-without-comments/1426092')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1426092 | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1426092 b/results/scraper/launchpad-without-comments/1426092 new file mode 100644 index 000000000..0448aa269 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1426092 @@ -0,0 +1,35 @@ +virtio-balloon-device locks up Guest + +Setting arbitrary balloon target values locks up the guest in some cases crashes it, if the target memory is < used +~5% free. +Found while testing aggressive memory over-commit, scenarios. +You get messages like: + +[ 155.827448] [<c002060c>] (show_stack) from [<c041c518>] (dump_stack+0x6c/0x88) +[ 155.837076] [<c041c518>] (dump_stack) from [<c0091994>] (warn_alloc_failed+0xe0/0x120) +[ 155.847075] [<c0091994>] (warn_alloc_failed) from [<c0094480>] (__alloc_pages_nodemask+0x600/0x91c) +[ 155.859039] [<c0094480>] (__alloc_pages_nodemask) from [<c00da414>] (balloon_page_enqueue+0x20/0xbc) +[ 155.870556] [<c00da414>] (balloon_page_enqueue) from [<c025d794>] (balloon+0x140/0x2cc) +[ 155.881377] [<c025d794>] (balloon) from [<c0043b38>] (kthread+0xd8/0xf4) + +page dumped bacause: nonzero _count +BUG: BAad page state in process Xorg pfn:396e5 + +Test Environment: +x86_64 +Ubuntu 13.10, Guest Linux Kernel 3.19, qemu 2.2.0 with following patches applied - balloon OOM enhancement +commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5 +Author: Raushaniya Maksudova <email address hidden> + +Boot guest with '-balloon virtio', -qmp .... -hmp access +1. sudo info balloon | socat - tcp4-connect:127.0.0.1:4444 + - or over qmp interface +{"execute":"qom-get", "arguments": { "path": "/machine/peripheral-anon/device[1]","property": "guest-stats" }} +{"return": {"stats": {"stat-swap-out": 0, "stat-free-memory": 513454080, "stat-minor-faults": 1261, "stat-major-faults": 0, "stat-total-memory": 526073856, "stat-swap-in": 0}, "last-update": 11109}} + +2. Take memory down check free memory using (1) +3. Issue "sudo echo balloon XXX | socat - tcp4-connect:127.0.0.1:4444" - XXX is value in threshold mentioned above + and you get Guest lockup + +ARM - samething except '-device virtio-balloon-device' used + +Libvirt - virsh setmem causes same issue. \ No newline at end of file |