Corinna Vinschen via Cygwin wrote:
On Apr 8 13:50, Corinna Vinschen via Cygwin wrote:
On Apr 7 09:59, Christian Franke via Cygwin wrote:
Found because 'stress-ng --fcntl 2 --verify' reports "ftruncate failed,
errno=21":
Thanks for the testcase. I know what happens. Stay tuned for a patch.
Nice problem. That's what happens if you try to do what an OS is doing,
without actually being an OS, just a user space lib. Theoretically we
should never cache any file information but always call the matching OS
functions. Only... this adds quite a few context switches every time
accessing files. Sigh.
I just pushed 2d81f6ebe3dc ("Cygwin: open: always fix up cached DOS file
attributes after NtCreateFile").
Try the upcoming cygwin-3.7.0-0.47.g9e6193576f34.
With a local build of 3.7.0-dev-49-g42df80dad079.x86_64, both the
testcase and stress-ng no longer fail.
--
Regards,
Christian
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