LVM and buffer requirement

[Kay Elcombe]

We had set up a 60GB logical volume group and it nearly killed the system
(SUSE Linux 7.0 on S/390 LPAR without VM). Almost all available memory had
been taken up for the buffer (480 MB of 512MB), and the OSA failed on IPL
due to a memory shortage. Would someone know  how the buffers are allocated
and freed ?
Thanks
Kay