No i/o is ever pending for my disks!

dE_logics · Advocate Joined: 02 Jan 2009 Posts: 2253 Location: $TERM

That's as per vmstat -d output. I'm talking about the second last column. It's always zero even when I got dd running and that USB flash disk busy indicator always show busy.

Oddly, the waiting for i/o column (sec) increments even when the cur column is 0.

roarinelk · Guru Joined: 04 Mar 2004 Posts: 520

did you set CONFIG_VM_EVENT_COUNTERS=y in your kernel config?

dE_logics · Advocate Joined: 02 Jan 2009 Posts: 2253 Location: $TERM

Yes, and /proc/vmstat does exist.
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dE_logics · Advocate Joined: 02 Jan 2009 Posts: 2253 Location: $TERM

Kernel bug?
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dE_logics · Advocate Joined: 02 Jan 2009 Posts: 2253 Location: $TERM

Vmstats bug.

/sys/block/<block dev>/stat

returns right value.
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dE_logics · Advocate Joined: 02 Jan 2009 Posts: 2253 Location: $TERM

[quote=http://books.msspace.net/mirrorbooks/linuxperformanceguide/0131486829/ch06lev1sec2.html]Note that there is a bug in recent versions of vmstat in which this is incorrectly divided by 1,000, which almost always yields a 0.[/quote]

I can reproduce this in Fedora also.

This project is dead.
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RazielFMX · l33t Joined: 23 Apr 2005 Posts: 835 Location: NY, USA

Have you tried dstat as an alternative?

dE_logics · Advocate Joined: 02 Jan 2009 Posts: 2253 Location: $TERM

The point of using this tool was that it's pre-installed in maximum distros.

Anyway, thanks for the package.
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