On 09/19/2012 12:23 AM, Dave Jones wrote:
On Tue, Sep 18, 2012 at 11:38:44AM -0700, Linus Torvalds wrote:
> Quoting the entire email, since I added Greg to the list of people (as
> the documented maintainer of debugfs) along with what I think are the
> guilty parties.
>
> Dave, is trinity perhaps doing read calls on the same file in parallel?
Yeah, entirely possible. It opens hundreds of fd's on startup, and then
a bunch of threads do whatever operations are specified on those fds.
(in this case, just read/setsockopt, but probably the read's are all that
is needed to trigger this)
Create a 350 processes reading /sys/kernel/debug/kvm/spinlocks/histo_blocked
file simultaneously in while loop for more than 3 hours on my box.
Could not reproduce the problem. ( was it the right thing I did to
reproduce.. not sure..). Wanted to check that because if it had hit the
problem I can verify fix with same stuff.
But in any case will try the fix what Konrad/Linus suggested, and come back.
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