amd64/87977 : [busdma] [panic] amd64 busdma dflt_lock called (by ata) if physmem>4G

Attila Nagy bra at
Tue Dec 27 12:42:22 PST 2005

Thomas Hurst wrote:
>>I believe this is fixed in CURRENT. On 6-STABLE you can set hw.physmem
>>to use a smaller amount of memory or switch to the ata driver before
> Thanks for the pointer.  I grabbed sys/dev/ata and sys/sys/ata.h off
> my CURRENT laptop and popped it on my RELENG_6 Opteron and it appears
> to work fine with all 4G -- I can pull data off all 4 disks at >250M/s
> without trouble when I could previously not even get past mounting
> filesystems.
> Hope to see this merged before too long, but for now at least this pr is
> a little bit more useful :)
Good to hear that, thanks.

According to Soren the whole ATA driver will be merged soon.

Attila Nagy                                   e-mail: Attila.Nagy at
Free Software Network (FSN.HU)                 phone: +3630 306 6758

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