Messages in this thread Patch in this message | | | Subject | Re: [ANNOUNCE] 3.0.1-rt8 - Regression to 3.0-rt7 | From | Peter Zijlstra <> | Date | Thu, 11 Aug 2011 14:41:38 +0200 |
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On Thu, 2011-08-11 at 14:02 +0200, Peter Zijlstra wrote: > On Thu, 2011-08-11 at 13:30 +0200, Tim Sander wrote: > > The error does not occur when configured with > > CONFIG_PREEMPT_RT_FULL=y > > but with > > CONFIG_PREEMPT_RTB=y. > > The same error also happens with > > CONFIG_PREEMPT_LL=y. (A log is appended after the other log just > > search for CONFIG_PREEMPT_LL > > for starting point). > > Does the below (on top of -rt8) cure things for you? Shouldn't make a > difference for PREEMPT_LL though, so maybe there's something else busted > as well. But from what I can tell PREEMPT_BASE should be fine with such > things disabling preemption..
Gah, nevermind, I'm sleeping or so..
--- Index: linux-2.6/mm/filemap.c =================================================================== --- linux-2.6.orig/mm/filemap.c +++ linux-2.6/mm/filemap.c @@ -2040,7 +2040,7 @@ size_t iov_iter_copy_from_user_atomic(st char *kaddr; size_t copied; - BUG_ON(!current->pagefault_disabled); + BUG_ON(!(in_atomic() || current->pagefault_disabled)); kaddr = kmap_atomic(page, KM_USER0); if (likely(i->nr_segs == 1)) { int left;
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