ZFS hanging

[Dennis Glatting]

On Sat, 2012-07-14 at 11:50 -0700, Dennis Glatting wrote:
> On Fri, 2012-07-13 at 23:57 +0200, Dimitry Andric wrote:
> > On 2012-07-13 15:47, Dennis Glatting wrote:
> > ...
> > > I am using clang except on my CVS mirrors.
> > > 
> > > I found on the mirrors that the mirror itself cannot update from itself
> > > but other hosts can update from the mirror. Somewhere in that
> > > M3/assembly muck something crashes in the process. The only way around
> > > the problem is to compile the /OS/ using GCC.
> > 
> > This is a known problem with ezm3, it aligns the stack incorrectly on
> > amd64.  See also bin/162588.  Possible workarounds are:
> > 
> > - Compiling libz with clang, but with SSE disabled
> > - Compiling the whole system with clang, but with SSE disabled
> 
> I considered this, tried it, and "make buildworld" returned:
> 
> clang++  -O2 -pipe -mno-sse -mno-sse2 -mno-sse3 -mno-sse -mno-sse2
> -mno-sse3
> -I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/include
> -I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/tools/clang/include -I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/lib/Support -I. -I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/../../lib/clang/include -DLLVM_ON_UNIX -DLLVM_ON_FREEBSD -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd9.0\" -DDEFAULT_SYSROOT=\"\" -I/usr/obj/usr/src/tmp/legacy/usr/include -fno-exceptions -c /usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/lib/Support/DAGDeltaAlgorithm.cpp -o DAGDeltaAlgorithm.o
> fatal error: error in backend: SSE register return with SSE disabled
> *** [APFloat.o] Error code 1
> fatal error: error in backend: SSE register return with SSE disabled
> *** [APInt.o] Error code 1
> fatal error: error in backend: SSE register return with SSE disabled
> *** [CommandLine.o] Error code 1
> 3 errors
> *** [bootstrap-tools] Error code 2
> 1 error
> *** [_bootstrap-tools] Error code 2
> 1 error
> *** [buildworld] Error code 2
> 1 error
> 
> 
> Perhaps My simple approach was wrong?
> 
> 	CFLAGS+= -mno-sse -mno-sse2 -mno-sse3
> 
> 


Sorry. Missed NO_CPU_CFLAGS.


> 
> 
> > - Fixing ezm3 so it aligns the stack to 16 bytes (left as exercise for
> >   the reader ;)
> > - Rewriting cvsup in C (another nice exercise...)
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> 
> 
> 
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-- 
Dennis Glatting <dg at pki2.com>