Messages in this thread Patch in this message | | | Date | Thu, 6 Jul 2006 01:24:40 -0700 | From | Andrew Morton <> | Subject | Re: 2.6.17-mm6 vmstat breakage |
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On Thu, 06 Jul 2006 09:38:43 +0200 Mike Galbraith <efault@gmx.de> wrote:
> Greetings, > > My single P4/HT box is showing incorrect pgpgin pgpgout numbers with > this kernel. While disk throughput for dd if=/dev/hdc of=/dev=null > bs=4096 count=1000000 produces about 57MB/S (up ~14% over 2.6.17 btw), > vmstat (procps version 3.2.5) is only showing about 7MB/S. > > Looking at the numbers in /proc/vmstat, it looks kinda like pgpgin might > be pages instead of the KB it used to be, with some added >>=1 action on > the side. At any rate, the numbers below are horse-pookey ;-) > > procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy id wa > 1 1 3820 9400 810128 46052 0 0 7040 0 1163 1283 2 7 48 44 > 1 1 3820 9220 810288 46156 0 0 7040 0 1151 1335 3 6 48 45 > 1 1 3820 9280 810176 46204 0 0 7168 0 1156 1207 1 7 48 44 > 2 1 3820 9408 810048 46068 0 0 7168 0 1160 1192 1 6 49 46 >
2.6.18-rc1 has the same bug.
--- a/include/linux/vmstat.h~count_vm_events-fix +++ a/include/linux/vmstat.h @@ -57,7 +57,7 @@ static inline void __count_vm_events(enu static inline void count_vm_events(enum vm_event_item item, long delta) { - get_cpu_var(vm_event_states.event[item])++; + get_cpu_var(vm_event_states.event[item]) += delta; put_cpu(); } _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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