The HyperNews Linux KHG Discussion Pages  Question: memcpy
error?  Forum: Device Drivers Keywords: memcpy verify_area Date:
Wed, 21 May 1997 14:33:34 GMT From: Edgar Vonk <>  I am using
memcpy in a device driver to copy data between to buffers in
kernel space (one is a DMA buffer) and I keep getting
segmentation faults I can't explain.  I changed the driver since
and now it copies the DMA buffer directly into user space with
memcpy_tofs (and verify_area) and this seems to work just fine.
Anyone know why? Does this have to do with the memcpy faults
under heavy system load? I saw a discussion and a kernel patch
about this somewhere.   (running i586-linux-2.0.30-RedHat4.1)