[dm-devel] new dm-bufio
Mikulas Patocka
mpatocka at redhat.com
Mon Aug 22 20:05:28 UTC 2011
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
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