On Saturday 13 October 2007 11:59:40 am Alson van der Meulen wrote: > * Jack Vogel <[EMAIL PROTECTED]> [2007-10-13 05:19]: > > A suggestion, take the relevant files from my em driver and put > > them back into the kernel tree that was working on 10/1, it should > > be compatible. Then see if it breaks that kernel. Or if you'd prefer > > I can just email the tar ball for the Intel version of 6.6.6, you can > > disable the in-kernel em driver, and build the other and use that > > with the 10/1 kernel. > > Then I removed sys/dev/em and copied it from the 10/12 sources. I also > copied sys/conf/files, sys/conf/kern.pre.mk and sys/modules/em/Makelfile > from the 10/12 sources; this should be all of the 6.6.6 merge. Compiled > with same config, booted with MSI/MSIX enabled. Surprisingly, this > kernel behaved different than the 10/10 and 10/12 kernels. It booted OK > without any major errors, only a few watchdog timeouts and link down/ups > on em0. It was very slow though. Top showed 60% interrupt. > > vmstat -i: > interrupt total rate > irq4: sio0 3563 8 > irq6: fdc0 1 0 > irq14: ata0 58 0 > irq16: fxp0 32076072 79593 > irq21: atapci1+ 24300 60 > cpu0: timer 793477 1968 > Total 32897471 81631 > > There wasn't much traffic on fxp0 (only ssh, ping and ntp). According to > dmesg, em0 used the same IRQ as fxp0, except it should be using MSI: > em0: <Intel(R) PRO/1000 Network Connection Version - 6.6.6> port > 0xdf00-0xdf1f mem 0xfdde0000-0xfddfffff,0xfddc0000-0xfdddffff irq 16 at > device 0.0 on pci5 > em0: Reserved 0x20000 bytes for rid 0x10 type 3 at 0xfdde0000 > em0: attempting to allocate 1 MSI vectors (1 supported) > msi: routing MSI IRQ 256 to vector 56 > em0: using IRQ 256 for MSI > em0: bpf attached > em0: Ethernet address: 00:15:17:19:59:e4 > em0: [FAST] > > It appears that em0 still generates interrupts on irq16, even though it > should be using MSI.
This was due to a bug with rman_set_rid() not getting used in 6-stable that broke the most recent MSI MFC. The rman thing was fixed on 10/3, so MSI is not expected to work on 6-stable kernels between 8/15 and 10/3. Are you still having problems with em + MSI? -- John Baldwin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
