Hi Jens, in an effort to avoid calling the ->request_fn() from hard irq context in ide, a patch like the one attached below would seem convenient (not even compile tested yet). However, before implementing this or, indeed, in case you should outright reject this patch, I'd like to ask for your opinion about a more general approach: Since ide, scsi and libata (once it has moved out of scsi) have very similar issues with devices that cannot process the request queue in parallel (typically because they are connected to the same controller), would it be appropriate to deal with that in the block layer directly? Currently, I'm mainly concerned with the problem that devices connected to the same controller are served without too much discrimination due to races in the (un)plug logic, which is currently being dealt with more or less cleverly in scsi / ide. Generally though, there might be other shared resources (like a tag map, etc.) that could be maintained in a in a block layer structure similar to struct Scsi_Host. All request queues belonging to such a group could be added to a circular link list rooted at the structure containing the shared resources, i.e. the unplug_timer and whatever you deem adequate to be moved there. What do you think about it? Regards, Elias -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
