[reiserfs-list] Reiserfs usage of get_hash_table()

[Marcelo Tosatti]

Hi, 

I was taking a look at reiserfs code on 2.4.5 and I found out something
which may be hurting performance quite badly.

There are quite a few places using get_hash_table() in the code without
calling "touch_buffer()" for the (possibly) found buffer_head. 

The "touch_buffer(bh)" call will set the referenced bit on "bh->b_page",
which is what informs the VM subsystem about the page usage.