On Wed, 2010-08-18 at 12:31 -0700, Sydir, Jerry wrote: > I am having trouble running profiling tools on the 2.6.33.7 kernel > with the rt29 patch. I am running on an Intel Core 2 machine. Then run a 64bit kernel already, seriously, your employer didn't spend all that silicon just so you could run 32bit crap. > When I run perf record I get a kernel oops. Here is the relevant log > info: > > BUG: sleeping function called from invalid context at arch/x86/mm/highmem_32.c:9 > pcnt: 14010003 0 in_atomic(): 1, irqs_disabled(): 1, pid: 3640, name: perf > Pid: 3640, comm: perf Not tainted 2.6.33.7-rt29 #3 > Call Trace: > [<c101d0c3>] ? kmap+0x41/0x52 > [<c100b66e>] ? perf_callchain+0x20d/0x2ac > [<c106abd9>] ? perf_prepare_sample+0x1d1/0x23b > [<c106ce0b>] ? __perf_event_overflow+0x20a/0x25e > [<c106d4bc>] ? perf_event_overflow+0xf/0x12 > [<c100c906>] ? intel_pmu_handle_irq+0x1fd/0x25d > [<c100b7a3>] ? intel_pmu_enable_all+0x3d/0xae > [<c1386478>] ? perf_event_nmi_handler+0x34/0x3f The below might cure that. --- arch/x86/kernel/cpu/perf_event.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 16307ff..4c178c3 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -2480,9 +2480,9 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n) offset = addr & (PAGE_SIZE - 1); size = min(PAGE_SIZE - offset, n - len); - map = kmap_atomic(page, type); + map = kmap_atomic_direct(page, type); memcpy(to, map+offset, size); - kunmap_atomic(map, type); + kunmap_atomic_direct(map, type); put_page(page); len += size; -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
