On Fri, Mar 29, 2013 at 06:00:17PM +0800, Li Zhong wrote: > This is the exception hooks for context tracking subsystem, including > data access, program check, single step, instruction breakpoint, machine > check, > alignment, fp unavailable, altivec assist, unknown exception, whose handlers > might use RCU. > > This patch corresponds to > [PATCH] x86: Exception hooks for userspace RCU extended QS > commit 6ba3c97a38803883c2eee489505796cb0a727122 > > Signed-off-by: Li Zhong <zh...@linux.vnet.ibm.com>
Is there a reason why you didn't put the exception_exit() call in ret_from_except_lite in entry_64.S, and the exception_entry() call in EXCEPTION_PROLOG_COMMON? That would seem to catch all these cases in a more centralized place. Also, I notice that with the exception_exit calls where they are, we can still deliver signals (thus possibly taking a page fault) or call schedule() for preemption after the exception_exit() call. Is that OK, or is it a potential problem? Paul. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
