On Wed, 2015-03-25 at 19:45 +0000, Richard W.M. Jones wrote: > On Wed, Mar 25, 2015 at 06:30:25PM +0000, David Woodhouse wrote: > > If the compiler is single-threaded, and increasing the stack ulimit > > fixes the problem, that implies that the default stack ulimit is less > > than the 8MiB-64KiB that it takes to reach the guard page... > > Just so I'm clear, is the stack supposed to grow down automatically > (ie. does the stack automatically use MAP_GROWSDOWN), or is OCaml > supposed to do something when the stack hits the guard page? > > I guess it's also possible that an OCaml stack frame is so big that it > skips the guard page, or that GCC does some kind of stack "filling" to > trigger the guard page which OCaml does not do. This is easy to trigger, right? Can you catch it in gdb and 't a a bt' -- dwmw2
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