> My system has 1G bytes RAM and free memory was about 550M bytes at
> the time of second build of the kernel. But it was very slow by hard
> disk accesses. It seems to be related with new memory allocation
> scheme for the buffer cache.

It looks like more directory vnodes stay in hold_list (as it has valid
buf) than before and thus regular file vnodes tend to be reclaimed
sooner (note that reg. vnode with page cache buf no reference is put
in free_list).

enami.