Messages in this thread | | | From | (Kanoj Sarcar) | Subject | Re: locking question: do_mmap(), do_munmap() | Date | Mon, 11 Oct 1999 12:07:08 -0700 (PDT) |
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> > What about something like a rw-semaphore which protects the vma list: > vma-list modifiers [ie merge_segments(), insert_vm_struct() and > do_munmap()] grab it exclusive, swapper grabs it "shared, starve > exclusive". > All other vma-list readers are protected by mm->mmap_sem. > > This should not dead-lock, and no changes are required in > vm_ops->swapout(). >
I have tried to follow most of the logic and solutions proposed on this thread. This is the best solution, imo. In fact, I had already coded something on these lines against a 2.2.10 kernel, which I still have around. I will try to port this against a 2.3.19 kernel over the next couple of days and post it for everyone to review.
Thanks.
Kanoj
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