Re: 2.4.20, .text.lock.swap cpu usage? (ibm x440)

William Lee Irwin III
2003-01-10T00:46:43Z

At some point in the past, I wrote:
>> Either pollwait tables (invisible in 2.4 and 2.5), kernel stacks of
>> threads (which don't get pae_pgd's and are hence invisible in 2.4
>> and 2.5), or pagecache, with a much higher likelihood of pagecache.

On Thu, Jan 09, 2003 at 06:44:10PM -0600, Brian Tinsley wrote:
> The "kernel stacks of threads" may have some bearing on my incarnation
> of this problem. We have several heavily threaded Java applications
> running at the time the live-locks occur. At our most problematic site,
> one application has a bug that can cause hundreds of timer threads (I
> mean like 800 or so!) to be "accidentally" created. This site is
> scheduled for an upgrade either tonight or tomorrow, so I will leave the
> system as it is and see if I can still cause the live-lock to manifest
> itself after the upgrade.

There is no extant implementation of paged stacks yet. I'm working on
a different problem (mem_map on 64GB on 2.5.x). I probably won't have
time to implement it in the near future, I probably won't be doing it
vs. 2.4.x, and I won't have to if someone else does it first.

Bill