[lkml]   [2008]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] pci: print out DMA mask info
Grant Grundler wrote:
> On Thu, Oct 09, 2008 at 02:51:32PM -0700, Yinghai Lu wrote:
>> On Thu, Oct 9, 2008 at 2:35 PM, Matthew Wilcox <> wrote:
>>> Why's that interesting to the sysadmin of the machine? To the driver
>>> writer, certainly. But what's the use of it to the people using the
>>> machine?
> ...
>> make linux kernel act like black box as other os?
> I don't understand your reply.
> If someone thinks linux is a black box, printing this message won't help them.
could find out easily why some driver doesn't set dma mask correctly.
like why
qlogic qla2xxx only set consistent to 64bit,
emulex lpfc not set consistent to 64bit
> "To flag use of bounce buffer or other suboptimal behaviors" could be debated.
> Regarding associating the output with other PCI messages, I'd hope the fact
> that the /sys entry is in the same directory as other sys files would be
> enough clue to associate those together. e.g.:
> grundler <2068>cd /sys/bus/pci/devices/0000\:01\:00.0/
> grundler <2069>ls
> broken_parity_status driver@ irq resource0 subsystem_device
> bus@ enable local_cpus resource1 subsystem_vendor
> class i2c-0/ modalias resource3 uevent
> config i2c-1/ power/ rom vendor
> device i2c-2/ resource subsystem@

add dma_mask coherent_dma_mask here?


 \ /
  Last update: 2008-10-10 01:11    [W:0.093 / U:3.452 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site