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Message-Id: <20100817.145908.112609486.davem@davemloft.net> Date: Tue, 17 Aug 2010 14:59:08 -0700 (PDT) From: David Miller <davem@...emloft.net> To: walken@...gle.com Cc: torvalds@...ux-foundation.org, tony.luck@...el.com, dhowells@...hat.com, akpm@...ux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: tasks getting stuck on mmap_sem? From: Michel Lespinasse <walken@...gle.com> Date: Tue, 17 Aug 2010 14:47:05 -0700 > On Tue, Aug 17, 2010 at 2:28 PM, Linus Torvalds > <torvalds@...ux-foundation.org> wrote: >> Oh, and it strikes me when looking at the sparc rwsem-const.h that it >> has some unsigned constants in it. I think >> >> #define RWSEM_WAITING_BIAS 0xffff0000 >> >> is actually unsigned, because it's a hex constant that doesn't fit in >> a signed int. So it's of type 'unsigned int' if I recall the C type >> rules right. > > Eeeek, this totally escaped me when I had a quick look at constant > signed-ness across architectures. This is definitely a problem. > >> #define RWSEM_WAITING_BIAS (-0x00010000) > > David, do you still see failures with v2.6.36-rc1 plus that one line fix ? As I said in a reply to Tony I don't even think your commit is to blame, because even after reverting it I still have the problems. I'll keep digging into this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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