mmap failure [was: cygrunsrv + sshd + rsync = 20 times too slow -- throttled?]

[Corinna Vinschen]

On Sep  5 09:24, Ken Brown via Cygwin wrote:
> On 9/4/2021 8:04 PM, Ken Brown via Cygwin wrote:
> > On 9/4/2021 6:58 PM, Ken Brown via Cygwin wrote:
> > > Here are the correct commits:
> > > 
> > > 8169e39ab Cygwin: C++17: register keyword is deprecated
> > > 3ca80b360 Cygwin: dumper: fix up GCC pragma for g++ 11.2
> > > bdb7991db Cygwin: workaround a g++ 11.2 initialization bug
> > > 801120c1f Cygwin: loader script: add DWARF 5 sections
> > > d5cc66426 Cygwin: testsuite: avoid "conflicting types" gcc warning
> > > c2fe205b5 strstr: avoid warnings
> > > 76c2c7a89 ldexp/ldexpf: avoid assembler warning
> > > eeeb5650c Cygwin: fix declaration of RtlInitEmptyUnicodeString
> > > 
> > > > 
> > > > > So there appears to be something wrong with cygwin1.dll
> > > > > built with the current build tools (gcc 11.2.0, binutils
> > > > > 2.37, not sure what else is relevant).
> > 
> > Wait a minute...I'll bet this is related to the MEM_EXTENDED_PARAMETER
> > initialization problem that was dealt with in commit bdb7991db.
> 
> More data: When I run the test case under gdb, it succeeds.  When I run it
> under strace, I see VirtualAlloc2 in fhandler_dev_zero::mmap failing with
> windows error 87.

Are the const's I added to the MEM_EXTENDED_PARAMETER data invalid,
perhaps?


Corinna