Hello,
kmalloc is returning 0 when I try to allocate 24335 bytes inside a FEC
driver that I am porting to coldfire uclinux 547x. I have enabled the
kernel feature "[*] Allow allocating large blocks (> 1MB) of memory" to
see if this fixes my problem, but no joy.
Does anyone have an idea of what I
Hi Dave,
Dave Meador wrote:
kmalloc is returning 0 when I try to allocate 24335 bytes inside a FEC
driver that I am porting to coldfire uclinux 547x. I have enabled the
kernel feature "[*] Allow allocating large blocks (> 1MB) of memory" to
see if this fixes my problem, but no joy.
Does anyone
Hi Greg,
I noticed that the kmalloc call uses the GFP_DMA flag. I am not sure if
that is a problem. FYI, I have also attempted to implemented DMA for
use with the FEC driver as the driver hooks into DMA interrupts for
callbacks when send/receive events occur. I don't know for certain that
the D
Okay, I have got a bit further on the kmalloc failure problem.
I found a discussion about ZONE_DMA in memory:
http://www.mail-archive.com/uclinux-dev@uclinux.org/msg03735.html
which discusses allocation of a ZONE_DMA region for kmalloc(x, GFP_DMA)
calls. If this zone is not setup, then kmalloc wi
