Messages in this thread | | | From | Francois Cartegnie <> | Subject | Crash on kmalloc with GFP_KERNEL | Date | Mon, 11 Aug 2003 11:09:26 +0200 |
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Hello,
I'm currently extending the u32 classifier (linux traffic control). I've experienced some strange behaviour with memory allocation : A single kmalloc with GFP_KERNEL leads to kernel panic (BUG, slab.c) when there's multiple requests matching the classifier. Thinking about concurrent access, I tried to lock the allocation with semaphores. The only way to solve it was to use GFP_ATOMIC (but I also experienced It still crash in some cases).
This is really similar to the bug report made on netfilter buzilla: https://bugzilla.netfilter.org/cgi-bin/bugzilla/show_bug.cgi?id=68
So I guess the memory allocations are interrupted by arrival of new packets and then crash. -Is there any way to fix it to use GFP_KERNEL memory allocations ?
-Also, the original u32 code uses GFP_KERNEL for storing it's matching rules. I guess It would crash here too if the rules are created under heavy network traffic. Any idea ?
Greetings,
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