> While debugging an issue with the aic7xxx driver, I noticed that SCSI > performance is quite poor for the current development kernel compared to > release kernels. > For a U160 disk attached to a 2940UW controller, FAST-20 mode [which, btw, > has to be forced manually, see > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=171282] delivers more > than 28 MB/s [hdparm -t /dev/sda] for the latest F7 update kernel > 2.6.22.1-33.fc7 [compared to the nominal rate of 40 MB/s] whereas it drops > by almost 30% to about 20 MB/s for rawhide kernel 2.6.23-0.49.rc1.git3.fc8 > which is barely more than in FAST-10 mode. It this difference of the order > one would expect? I've seen similar results before which I attributed to the added debugging turned on in the rawhide kernels. - orion -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
