[PATCH v2] Single threaded stdio optimization

[Siddhesh Poyarekar]

On Friday 30 June 2017 06:08 PM, Szabolcs Nagy wrote:
> your code layout does not work for most
> io apis as they use _IO_acquire_lock/unlock
> which create a new scope for cancel cleanup
> handling.
> 
> it only works with non-cancellation point
> apis (flag checks: feof, ferror) that just
> flockfile/funlockfile.
> 
> i can change those two functions where it
> works but i dont think it will be any more
> maintainable.

Right, that won't work.  There should be a cleaner way to do both, but I
can't think of one right now, so I'll let that go.

So the only open points right now is the comment I asked you to add
describing what/why you're doing this for stdio and the performance
question on x86.  So Carlos, etc. who are monitoring this will tell you
when they're satisfied with your updated results.

Siddhesh