mmap failing

[Wayne Christopher]

My test program is attached.  This example works but in my real program 
the same write+close+mmap sequence did not.

It appears that calling fsync before the close sometimes avoids the 
error but not always.

This is Cygwin 1.5.24(0.156/4/2).

Any thoughts?  Thanks,

    Wayne

Corinna Vinschen wrote:
> On Dec 14 13:59, Wayne Christopher wrote:
>   
>> I have a 268MB file open for writing.  I close it and then
>> immediately try to mmap() it, and a get ENOMEM.  However I do have the
>> VM space available and can malloc() the size of the file right after the 
>> failure.  Also, I have mmap()'ed other similar files in the same program 
>> before this, but these had not just been closed.
>>
>> My initial guess was that it was timing related, but if I wait for 5
>> seconds and try again I still get the failure.
>>
>> I wasn't able to duplicate it in a small example since my app has a bunch 
>> of threads and is doing other stuff at the same time.
>>
>> Any suggestions for solutions or workarounds?
>>     
>
> Not without testcase and version information.  Is that under 1.5.24-2
> or 1.5.25-x?  Could you test if the result differs between these two
> versions?  If so, how?
>
>
> Corinna
>
>   

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