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with more than the normal amount of stack pages, however the stack pointer always wound up being initialized using KSTACK_PAGES. It should be using td->td_kstack_pages instead. This means that although the vm subsystem would give you all the stack pages you asked for, %esp would always be initialized as if you had just 2 pages, and the rest would go to waste. I wanted to use the 'give me more stack pages' feature of kthread_create() because the Intel 2200BG NDIS driver does an alloca() of about 5000 bytes, which wrecks the stack with the default 2 page size, and I was baffled that no matter how much code I shoved into thread contexts with allegedly larger stacks, the thing would still crash unless I changed KSTACK_PAGES. Note: this bug is present in _ALL_ arches at this point. Peter has promised to merge this fix into all of them. |
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| i386 | ||
| ibcs2 | ||
| include | ||
| isa | ||
| linux | ||
| pci | ||
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| Makefile | ||