On Wednesday, December 20, 2017 09:59:26 AM David Chisnall wrote: > On 16 Dec 2017, at 18:05, John Baldwin <j...@freebsd.org> wrote: > > > > When I build a FreeBSD/mips64 kernel with clang, > > _any_ simple NFS op triggers a kernel stack overflow. Kernels compiled > > with GCC do not. > > That is not my experience. I haven’t tried a MIPS64 kernel built with clang, > but with in-tree gcc I get kernel panics as soon as I try to use NFS, unless > I use Stacey’s patches that increase the kernel stack size.
I have primarily been using modern GCC for GCC once that was working, but at least when running a MALTA64 kernel under qemu I was not triggering panics even with old GCC. With the in-tree clang 5.0 or with CHERI clang, just doing an 'ls' of a NFS directory or even a tab-complete of a path that is on NFS reliably triggers a kernel stack overflow for MALTA64 in qemu. With Stacey's kstack pages, a clang kernel does survive, but those are not in stock FreeBSD which is where I have been testing this. -- John Baldwin _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
