Re: LSI MegaRAID not recognised correctly in 64-bit. 2.6.29.6

[Eddie <stunnel@attglobal.net>]

James Bottomley wrote:
> On Wed, 2009-09-16 at 19:59 -0700, Eddie wrote:
>   
>>>> How much memory does your system have?
>>>>
>>>> Best guess in the 64 bit case is that the physical memory the kernel is
>>>> doing DMA to isn't within the range of the card.  You might be able to
>>>> test this by booting with the max_addr=4G parameter in the 64 bit case.
>>>>
>>>> If it is, we'll have to get the DMA mask for this thing set up
>>>> correctly.
>>>>
>>>> James
>>>>   
>>>>         
>>> James,
>>>
>>> It's got 8Gig.
>>>
>>> I'll try your suggestion tonight, when I get home.
>>>
>>> Cheers,
>>> Eddie
>>>
>>>       
>> OK, adding addappend = " max_addr=4G" to my lilo.conf made no 
>> difference.  It still booted with all 8G.  :(
>>
>> But, changing it to addappend = " mem=4G" seemed to do the trick.
>>
>> And, your guess might be correct.  I now see the correct messages for 
>> the MegaRAID:
>>
>> scsi 4:4:0:0: Direct-Access     MegaRAID LD 0 RAID5 1430G N661 PQ: 0 ANSI: 2
>> sd 4:4:0:0: [sda] 2930307072 512-byte hardware sectors: (1.50 TB/1.36 TiB)
>> sd 4:4:0:0: [sda] Write Protect is off
>> sd 4:4:0:0: [sda] Mode Sense: 00 00 00 00
>> sd 4:4:0:0: [sda] Asking for cache data failed
>> sd 4:4:0:0: [sda] Assuming drive cache: write through
>> sd 4:4:0:0: [sda] 2930307072 512-byte hardware sectors: (1.50 TB/1.36 TiB)
>> sd 4:4:0:0: [sda] Write Protect is off
>> sd 4:4:0:0: [sda] Mode Sense: 00 00 00 00
>> sd 4:4:0:0: [sda] Asking for cache data failed
>> sd 4:4:0:0: [sda] Assuming drive cache: write through
>>  sda: sda1
>> sd 4:4:0:0: [sda] Attached SCSI disk
>> sd 4:4:0:0: Attached scsi generic sg1 type 0
>>     
>
> Hmm, so the driver looks to do this correctly.  By default it sets a 32
> bit DMA mask but it raises it to 64 bits for certain boards which can
> support that (based on the PCI ids).  Can you do an lspci -n -v and send
> the output?  That will tell me whether the board got a 64 bit mask.
>
> Thanks,
>
> James
>
>   
James,

This is when booted with the "mem=4G" override still in place.  If you 
need it without that, when it fails to "see" the device, let me know, 
and I'll re-boot tonight to gather it:

01:04.0 0104: 101e:1960 (rev 02)
        Subsystem: 101e:0511
        Flags: bus master, fast Back2Back, medium devsel, latency 64, IRQ 19
        Memory at b8000000 (32-bit, prefetchable) [size=64K]
        [virtual] Expansion ROM at b8010000 [disabled] [size=32K]
        Capabilities: [80] Power Management version 2
        Kernel driver in use: megaraid
        Kernel modules: megaraid_mbox

Cheers,
Eddie