On Wed, Nov 19, 2014 at 10:40 AM, Linus Torvalds <torva...@linux-foundation.org> wrote: > On Tue, Nov 18, 2014 at 3:15 PM, Andy Lutomirski <l...@amacapital.net> wrote: >> On x86, sleeping while on an IST or irq stack has a surprisingly >> good chance of working, but it can also fail dramatically. Add an >> arch hook to allow schedule and __might_sleep to catch sleeping on >> the wrong stack. > > Why doesn't the normal in_interrupt() test catch this?
It catches scheduling on an irq stack, assuming that all of the irq_count stuff is working correctly. I don't think it catches sleeping on an IST stack. --Andy > > Linus -- Andy Lutomirski AMA Capital Management, LLC -- 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/
