contiguous memory allocation problem

Peter Jeremy peterjeremy at optushome.com.au
Fri Jun 30 20:32:35 UTC 2006


On Fri, 2006-Jun-30 20:29:28 +0200, Hans Petter Selasky wrote:
>I sometimes see that the USB driver is unable to allocate contiguous memory 
>for itself. For example I noticed that FreeBSD was unable to allocate 
>350kbytes of contiguous memory after that I had run "konqueror", the KDE web 
>browser and various other memory consuming applications for a while.

I reported this about 18 months ago and I'm fairly certain you even
contributed to the thread at the time.

>Any comments?

The latest concensus seems to be that the USB system should make use of
the scatter-gather facilities in the hardware to avoid the need to
allocate large contiguous memory chunks.  iedowse@ had mostly finished
implementing this in mid May.

-- 
Peter Jeremy
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-hackers/attachments/20060630/f62284ee/attachment.pgp


More information about the freebsd-hackers mailing list