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A comment on Two new ways to read a file quickly. Parent comment

Re:Two new ways to read a file quickly by yxhuvud on Saturday March 07, 2020 @02:42AM (#22510392)
What will happen though, if the fd is already used by some other area of userspace? Like what if some lib you link to also happen to hardcore the use of the same fd. Sounds like unfunny problems to debug.

In the case of uring I suppose it is possible to link the calls to fail at the first failure.

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Re:Two new ways to read a file quickly by JoshTriplett on Saturday March 07, 2020 @03:15AM (#22510512)
> What will happen though, if the fd is already used by some other area of userspace?

That's what the min_fd patch is for, and potentially other systems for reserving blocks of fds. Much like memory, you'll ask the kernel for a block of it and then do your own allocations out of that.

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Re:Two new ways to read a file quickly by yxhuvud on Saturday March 07, 2020 @11:57AM (#22512532)
Ah, it will be possible to allocate multiple blocks of file descriptors? Ok, then things start to make sense.
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