Hi Juergen,
I've found another regression that happens only with sched-gran=core.
CentOS 5.11 (PV, CPUs: 32; RAM: 6GB) kernel hangs during suspend attempt.
The last kernel messages are:
CPU 1 offline: Remove Rx thread
CPU 2 offline: Remove Rx thread
Kernel: Linux localhost 2.6.18-398.el5xen #1 SMP Tue Sep 16 21:31:50 EDT 2014
x86_64 x86_64 x86_64 GNU/Linux
xl top shows 100% CPU utilization for the hanged VM. And here's its state:
(XEN) [ 1907.976356] *** Dumping CPU14 guest state (d1v0): ***
(XEN) [ 1907.982558] ----[ Xen-4.13.0-8.0.6-d x86_64 debug=y Not tainted
]----
(XEN) [ 1907.990704] CPU: 14
(XEN) [ 1907.993901] RIP: e033:[<ffffffff80264a7b>]
(XEN) [ 1907.999333] RFLAGS: 0000000000000286 EM: 1 CONTEXT: pv guest (d1v0)
(XEN) [ 1908.007282] rax: 0000000000000001 rbx: ffffffff80522b80 rcx:
0000000000000000
(XEN) [ 1908.016203] rdx: ffffffff80522b90 rsi: 0000000000000079 rdi:
ffffffff8052a980
(XEN) [ 1908.025121] rbp: ffffffff80522980 rsp: ffff88017106dcf8 r8:
ffff88017106c000
(XEN) [ 1908.034040] r9: 0000000000000000 r10: 0000000000000000 r11:
ffff880176fad8c0
(XEN) [ 1908.042962] r12: 0000000000000001 r13: 0000000000000000 r14:
ffffffff80522980
(XEN) [ 1908.051881] r15: 0000000000000003 cr0: 000000008005003b cr4:
0000000000142660
(XEN) [ 1908.060800] cr3: 000000801d8c0000 cr2: 00002b5400970000
(XEN) [ 1908.067393] fsb: 0000000000000000 gsb: ffffffff80639000 gss:
0000000000000000
(XEN) [ 1908.076311] ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs:
e033
(XEN) [ 1908.084650] Guest stack trace from rsp=ffff88017106dcf8:
(XEN) [ 1908.091147] ffffffff802c3dd4 0000000001168460 ffffffff80522b90
0000000000000079
(XEN) [ 1908.100164] ffffffff80522b80 ffffffff80522980 0000000000000001
0000000000000000
(XEN) [ 1908.109179] 0000000000000003 0000000000000003 ffffffff802c4041
ffff88017d68b040
(XEN) [ 1908.118197] 0000000000000003 0000000000000003 0000000000000007
0000000000000003
(XEN) [ 1908.127213] 00000000ffffffea ffffffff8029f0ad ffffffff802c4092
ffffffff8050ff90
(XEN) [ 1908.136229] ffffffff80268111 0000000000000003 0000000000000000
ffff88017d68b040
(XEN) [ 1908.145245] ffffffff802a408b 0000000000000000 ffff8800011d3860
fffffffffffffff7
(XEN) [ 1908.154263] ffffffffffffffff ffffffffffffffff 7fffffffffffffff
0000000000000001
(XEN) [ 1908.163278] 0000000000000000 0000000000000000 0000000000000000
0000000000000000
(XEN) [ 1908.172296] 0000000000000003 0000000000000003 0000000000000000
ffff88017f5ebce0
(XEN) [ 1908.181312] 0000000000000000 ffff88017f5ebcd0 ffffffff803be1a6
0000000000000001
(XEN) [ 1908.190328] 0000000000000000 ffffffff803be9dd ffffffff803bea43
ffff88017106deb0
(XEN) [ 1908.199345] ffffffff80289495 0000000300000000 ffff88017f5ebce0
ffff88017f5ebce8
(XEN) [ 1908.208362] 0000000000000000 ffff88017f5ebcd0 ffffffff8029f0ad
ffff88017106dee0
(XEN) [ 1908.217379] 0000000000000000 ffff88017f5ebce0 0000000000000000
ffff88017f5ebcd0
(XEN) [ 1908.226396] ffffffff8029f0ad 0000000000000000 ffffffff80233ee4
0000000000000000
(XEN) [ 1908.235413] ffff88017d8687f0 ffffffffffffffff ffffffffffffffff
ffffffffffffffff
(XEN) [ 1908.244427] 7fffffffffffffff ffffffffffffffff ffff8800011d3860
ffff88017f5ebcd0
(XEN) [ 1908.253444] ffff88017f5ebc78 ffff88017f5ce6c0 ffffffff80260b2c
0000000000000000
(XEN) [ 1908.262461] ffffffff8029f0ad ffff88017f5ebcd0 0000000000000000
ffff88017f5ce6c0
Thanks,
Sergey
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