On 05/06/15 at 10:16am, Joerg Roedel wrote: > On Wed, May 06, 2015 at 09:46:49AM +0800, Dave Young wrote: > > For the original problem, the key issue is dmar faults cause kdump kernel > > hang so that vmcore can not be saved. I do not know the reason why it hangs > > I think it is acceptable if kdump kernel boot ok with some dma errors.. > > It hangs because some devices can't handle the DMAR faults and the kdump > kernel can't initialize them and will hang itself. For that it doesn't > matter whether the fault was caused by a read or write request.
Ok, thanks for explanation. so it explains sometimes kdump kernel boot ok with faults, sometimes it hangs instead. Dave -- 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/
