[dm-devel] new dm-bufio

[Mikulas Patocka <mpatocka redhat com>]

I uploaded new dm-bufio patch at 
http://people.redhat.com/mpatocka/patches/kernel/dm-thinp-bufio/dm-bufio.patch

It reports the number of allocated bytes in 
"/sys/module/dm_bufio/parameters/". There is a file "total_allocated" that 
contains the number of bytes allocated for buffer cache. There are files 
"allocated_get_free_pages", "allocated_kmalloc", "allocated_vmalloc" that 
contain a number of allocated bytes with each method.

BTW. if you store "1" in "cache_size", it switches to a mode where it 
won't allocate any memory during operation, relying only on preallocated 
reserves --- useful for testing reservation deadlocks.

Mikulas