Re: [Xen-devel] [PATCH] xenstore: increase default thread stack size to 32k

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Thu, Feb 22, 2018 at 11:16:53AM +0000, Ian Jackson wrote:
> Jim Fehlig writes ("[PATCH] xenstore: increase default thread stack size to 
> 32k"):
> > On several Skylake machines I've observed xl segfaults when running
> > create or destroy subcommands. Other subcommands may segfault too,
> > but I've only looked at create and destroy which share a similar
> > backtrace
> 
> Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> 
> However, I am concerned that this isn't a very systematic way of
> addressing this problem.  How do we know that 32K is enough ?
> We have already increased this number once.
> 
> Alternatively, maybe this ia a bug in the platform libc ?

Is it really that bad to use the default thread stack size? That's
going to be much bigger, I know, but I assume physical memory for the
stack will be mapped on demand, and thus the physical memory usage is
not going to be that different.

I've been always told to simply not play with the stack size.

Roger.

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