>this paramter mean use all physical memory and about 1GB swap space. >Could you expand swap space? We can reproduce the soft lockup issue now and root cause the issue as well. Since the ptc.g patch uses semaphore ptcg_sem to serialize multiple ptc.g instructions in ia64_global_tlb_purge(). This requires the code path should be safe to sleep in down(). But the code path can not sleep during swap because it holds some spin locks (e.g. anon_vma_lock). Going to sleep finally causes soft lockup. Actually we though of this issue before releasing the ptcg patch and wrote some non-sleeping versions of ptcg patches. But since we couldn't see the sleeping issue during our testing, we didn't release a non-sleeping ptcg patch. If replacing the ptcg patch in -mm1 tree with one of our non-sleeping ptcg patches, the issue goes away. Tony and I are working on releasing a final ptcg patch to solve the issue. Thanks. -Fenghua -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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