[Mingw-msys] I can't excute command in msys

[Bo Y. <tec...@gm...>]

Hi,
   I am now running a long time build process on Msys. But I got many 
strange errors. After I run "make" for a while (about 30 minutes) then I 
got the error:

/bin/sh.exe: fork: Permission denied

Not only sh.exe command, any command such as make.exe, sed.exe may 
failed with this error. Could you please tell me what is it? Thanks!

Regards!
Bo