On Wed, Jul 18, 2012 at 1:54 PM, Oleg Goldshmidt <p...@goldshmidt.org> wrote:
> Hi, > > I have a new computer with CentOS 6. I happened to start a rather long > task that I think is memory-, but not CPU-, intensive. Just for the fun of > it I started top, and was very surprised to see that the first two lines > were always > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ > COMMAND > > 38 root 20 0 0 0 0 R 66.2 0.0 2671:58 > kacpid > > 39 root 20 0 0 0 0 S 32.6 0.0 1320:31 > kacpi_notify > > It looks a lot like various issues with laptops from way back, e.g., > https://bugzilla.redhat.com/show_bug.cgi?id=451896, > https://bugzilla.redhat.com/show_bug.cgi?id=454954, etc. This one is a > regular PC working as a server in a cool server room, just arrived about a > week ago. 2CPUs, 4G of RAM, 2 HDs in software RAID1, nothing special. > Kernel 2.6.32-220.23.1.el6.x86_64 (RedHat). > > I understand it may be a BIOS issue with ACPI implementation, or it may be > a kernel bug (though I'd expect those to be sorted out by now, given that > the general issue is old). I have not yet tinkered with the BIOS or the > kernel (may do it on Sunday when customers sleep), but I am vaguely > concerned that if I manage to switch ACPI off in the BIOS I may miss real > overheating (of which this may be a symptom - ?). > > Nothing helped - upgraded the kernel (well, not much, to 2.6.32-279), tried to boot with "acpi_osi=", tinkered with BIOS power settings (disabled everything), but the offending tasks disappeared from the top of top(1) only after I did echo disable > /sys/firmware/acpi/interrupts/gpe_all As far as I understand the issue may be flaky HW or cable or something, but I do not know what it is. I also do not understand completely what the possible ramifications of the above action may be. So far I added the above command to /etc/rc.local. If anyone has any insights, do let me know. -- Oleg Goldshmidt | o...@goldshmidt.org
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