3.10.0-rcX vmstat regression

From: Shane Shrybman
Date: Mon Jun 10 2013 - 16:29:34 EST

Hello,

x86_64 with 32 bit user space, seen on all 3.10.0-rc's

A typical 'vmstat 1' run looks like this:

~$ vmstat 1
procs -----------memory---------- ---swap-- -----io---- -system--
----cpu----
r b swpd free buff cache si so bi bo in cs us sy
id wa
0 0 0 3624776 26060 209808 0 0 1232 7 399 463 1 0 81 18
0 0 0 3624816 26060 209856 0 0 0 0 625 526 0 0 100 0
0 0 0 3624612 26064 209852 0 0 4 56 1174 1574 0 0 99 1
1 0 0 3624652 26064 209900 0 0 4 0 1501 2126 0 0 100 0
1 0 0 3624576 26076 209888 0 0 8 132 1299 1941 0 0 98 2
1 0 0 3624044 26088 210268 0 0 380 0 1642 2996 0 0 93 7
1 0 0 3628992 26140 219896 0 0 2783 7 1727 3284 0 0 85 15
0 1 0 3588504 26288 244572 0 0 5955 0 2096 3874 0 0 27 73
1 2 0 3572732 26428 253152 0 0 8792 212 1730 2374 0 0 27 73
1 7 0 3566128 26492 257696 0 0 1915 268 1832 2885 0 0 11 89
5 37 0 3527996 26576 270212 0 0 5668 0 2382 5117 0 0 9 91
3 3 0 3471676 26668 284616 0 0 8504 12 2334 4502 0 0 15 85
1 5 0 3485732 26852 264932 0 0 4556 0 1861 3648 0 0 8 92
3 4 0 3438112 26872 270956 0 0 1822 0 1770 5000 0 0 0 100
5 2 0 3405560 26916 274628 0 0 3413 96 2360 5571 0 0 9 91
5 1 0 3378800 26952 273024 0 0 1805 0 1968 4489 0 0 0 100
Floating point exception

Two problems are shown: the floating point exception and the user and
system stats are always 0, it looks like us and sys time are showing up
as wait time.

CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
# CONFIG_NO_HZ_IDLE is not set
CONFIG_NO_HZ_FULL=y
CONFIG_NO_HZ_FULL_ALL=y
CONFIG_NO_HZ=y
# CONFIG_HIGH_RES_TIMERS is not set

Sorry if this report is a duplicate,

Shane

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