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[Bug sanitizer/59733] [4.9 Regression] bootstrap-asan failed to bootstrap


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59733

Kostya Serebryany <kcc at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #25 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
Even with this workaround asan is almost unusable with the buggy kernel.
I suspect that when a process has too many mappings it gets too slow.
The machine where we have our clang-asan bootstrap gets very slow and
unreliable.

We have reverted the kernel on that bot 
(http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap/)
and reverted the above workaround in llvm trunk.
http://llvm.org/viewvc/llvm-project?rev=200217&view=rev

The kernel fix went into Linus's tree for 3.14 last week,
and was tagged for stable backport. Nothing else we could do here.


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