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Date: Sun, 13 Jul 2008 14:32:10 -0700 From: Jeremy Fitzhardinge <jeremy@...p.org> To: "Jakub W. Jozwicki" <jozwicki@...er.pl> CC: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...esys.com Subject: Re: [PATCH 2.6.25.10 1/2] libata: fix locking for kmap_atomic Jakub W. Jozwicki wrote: > Sunday, 13 of July 2008 19:46:29 Jeremy Fitzhardinge napisaĆ(a): > >> Jakub W. Jozwicki wrote: >> >>> Sorry, this was for -rt only. >>> >>> [ 17.012011] BUG: sleeping function called from invalid context >>> IRQ-14(5732) at arch/x86/mm/highmem_32.c:8 >>> [ 17.012011] in_atomic():0 [00000000], irqs_disabled():1 >>> [ 17.012011] Pid: 5732, comm: IRQ-14 Not tainted 2.6.25.10-rtXXX #11 >>> [ 17.012011] [<c0120fc4>] __might_sleep+0xf1/0xf8 >>> [ 17.012011] [<c011c035>] kmap+0x47/0x5a >>> >> The subject says kmap_atomic, but this is kmap. It definitely makes no >> sense to call kmap in an IRQ, regardless of the locking. There seems to >> be a larger structural problem here. >> >> > > --- linux-2.6.25.8-rt7.orig/include/asm-x86/highmem.h 2008-06-23 > 19:12:47.000000000 -0400 > +++ linux-2.6.25.8-rt7/include/asm-x86/highmem.h 2008-06-23 > 19:13:58.000000000 -0400 > > > +/* > + * on PREEMPT_RT kmap_atomic() is a wrapper that uses kmap(): > OK, I guess the "structural problem" is RT ;) J -- 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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