rsync over ssh hang issue understood

Tue May 2 12:12:00 GMT 2006

On 01 May 2006 15:58, Brian Ford wrote:
> On 2006年4月27日, Dave Korn wrote:
>>> On 26 April 2006 20:34, Steven Hartland wrote:
>>>>> Interestingly if I try to get a thread dump using
>>> sysinternals process explorer the rsync process goes
>>> mad using all available cpu.
>>>> That's a known issue, and one which I'd like to try and work on, but
>> it's really complex. It's a side-effect of procexp doing an
>> RtlQueryProcessDebugInformation call on the cygwin process, which works
>> internally by injecting a remote thread into the cygwin process; this
>> new thread interacts badly with dll csrss in some way because it isn't
>> "lpc-registered".
>> FWIW, I believe this behavior started about the time thread local storage
> at the base of the stack was implimented via thread creation interception
> by the cygwin1.dll.
>> Just a WAG, but you might consider disabling that in some way to test.
> You might also consider disabling the code to force double stack alignment
> in same. Just in case you're open for leads that I don't have time to
> investigate ;-).

 Thanks, that's just the sort of hint I was looking for. Will report back as
and when (if!) I figure it out.
 cheers,
 DaveK
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