Messages in this thread | | | From | David Woodhouse <> | Subject | Re: manipulating sigmask from filesystems and drivers | Date | Thu, 01 Aug 2002 23:50:11 +0100 |
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torvalds@transmeta.com said: > It's not the kernel side that is not restartable. It's the _user_ > side.
As I said, you can't allow it to be interrupted after you've started the copy_to_user(). Show me how the userspace program can prove the signal arrived _after_ the 'int 0x80' had trapped into the kernel rather then beforehand, and I'll accept that you can't allow read() to be interrupted even before the copy_to_user() starts.
But I also agree that there are other, better, examples of why TASK_UNINTERRUPTIBLE has to be used sometimes. Page faults in copy_{from,to}_user are probably one such.
It's just that it doesn't have to be scattered all over the place just because people are too lazy to do the cleanup code.
Yeah -- sometimes it's hard. So go shopping.
-- dwmw2
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