On 11/18/12 5:06 PM, "NeilBrown" <neilb@xxxxxxx> wrote: > >Hi Dan, > could you comment on this please? Would it make sense to arrange for >errors > to propagate up? Or should we arrange to do a software-fallback in the >dma > engine is a problem? What sort of things can cause error here anyway? Propagating up is missing reliable "dma abort" operation. In these cases the engine failed to complete due to hardware hang / driver bug, or has hit a memory error (uncorrectable even with software fallback). This originally should have been using async_tx_quiesce() which also does the panic. The engines that I have worked with have either lacked support for aborting, or were otherwise unable to recover from a hardware hang. However, for engines that do support error recovery they should be able to hide the failure from the upper layers. -- Dan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
