On 10/28/2013 08:30 AM, yang jun wrote: > Dear Mr.Axboe, > > The latest kernel sr_module still uses single mutex,it will serialise > all sr ioctls. Otto Meta had mentioned this on Jan 1st, 2013 . Some > record tools such as growisofs use SG_IO to write data to disc, so if > there are multiple cdroms being recorded at the same time，it will be > very slowly. > > I saw sd_module before,it had removed BKL and made "openers" atomic_t > in scsi_disk. Shall we do the same thing to sr_module? That is, to > remove sr_mutex and make "use_count" atomic_t in cdrom_device_info. The same conversion that happened to sd could apply to sr just as easily. -- Jens Axboe -- 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
