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: http://www.arcetri.astro.it/irlab/doc/library/linux/khg/HyperNews/get/devices/devices/20.html
Дата изменения: Thu Mar 23 12:37:19 2000 Дата индексирования: Wed Sep 15 04:21:31 2010 Кодировка: Поисковые слова: star |
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. thanks, (running i586-linux-2.0.30-RedHat4.1)
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