Given CentOS 6.3 box (2.6.32).
I compile sources in the Linux. The source tree is located on Windows 7 box, which is CIFS mounted.
Everything was ok, till recently compilation time started to grow to some unreasonble times (e.g. several minutes to link a separate file).
I notices processes involved in compilation (make, gcc, ld) enter uninterruptible sleep state ('D' state in top).
Any ideas wht is the problem and how to solve it?
I have just had the same problem with processes entering uninterruptible sleep when writing many files to a CIFS mounted SMB share.
There are some good explanations of uninterruptible processes on the question "What is an uninterruptible process?"
I was able to resolve the issue by using autofs to manage the CIFS mounts rather than using fstab.
autofs is a program for automatically mounting directories on an as-needed basis. Auto-mounts are mounted only as they are accessed, and are unmounted after a period of inactivity. Because of this, automounting NFS/Samba shares conserves bandwidth and offers better overall performance compared to static mounts via fstab.
