Intel 82574L (em)

[Sean Bruno]

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On 02/02/15 09:35, Pieper, Jeffrey E wrote:
> In the past we have, yes. This was a few years ago, but iirc the
> current implementation is supposed to be the official  solution.
> 
> Jeff


Jeff:

Thanks for you feedback.

Jack:

I've tried compiling with EM_MULTIQUEUE set to 1 and changing
num_queues to 2 and current just for fun.  It panics on
initialization.  Not sure if you guys care or not.

diff:
Index: sys/dev/e1000/if_em.c
===================================================================
- --- sys/dev/e1000/if_em.c       (revision 273639)
+++ sys/dev/e1000/if_em.c       (working copy)
@@ -88,6 +88,7 @@
 #include "e1000_82571.h"
 #include "if_em.h"

+#define EM_MULTIQUEUE 1
 /*********************************************************************
  *  Set this to one to display debug statistics
  *********************************************************************/
@@ -2438,7 +2439,7 @@
        adapter->hw.hw_addr = (u8 *)&adapter->osdep.mem_bus_space_handle;

        /* Default to a single queue */
- -       adapter->num_queues = 1;
+       adapter->num_queues = 2;

        /*
         * Setup MSI/X or MSI if PCI Express



panic:

Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer	= 0x20:0xffffffff8093bf6d
stack pointer	        = 0x28:0xfffffe011e3b1b80
frame pointer	        = 0x28:0xfffffe011e3b1bb0
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 0 (em0 rxq)
trap number		= 9
panic: general protection fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff8092e150 at kdb_backtrace+0x60
#1 0xffffffff808f76c1 at panic+0x1c1
#2 0xffffffff80cbf93f at trap_fatal+0x38f
#3 0xffffffff80cbf59e at trap+0x74e
#4 0xffffffff80ca5132 at calltrap+0x8
#5 0xffffffff808ccaa1 at fork_exit+0x71
#6 0xffffffff80ca566e at fork_trampoline+0xe
Uptime: 1s
Automatic reboot in 15 seconds - press a key on the console to abort

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