glusterfs.git/xlators/performance/io-cache/src, branch v3.0.1rc3

Added null checks in "fini"

2009-12-18T16:41:29+00:00

Signed-off-by: Harshavardhana 
Signed-off-by: Vijay Bellur 

BUG: 364 (Segfault in io-cache)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=364

fixes to compile on MacOSX (no fuse client)

2009-12-02T03:48:41+00:00

These changes are required to make GlusterFS compile on MacOSX (10.5).

Currently glusterfs server component alone will work over Mac, and it has
to be built with following options to ./configure.

 "bash$ ./configure --disable-fuse-client --disable-fusermount "

Signed-off-by: Amar Tumballi 
Signed-off-by: Anand V. Avati 

BUG: 361 (GlusterFS 3.0 should work on Mac OS/X)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=361

performance/io-cache: Hold locks on inode before creating rbt tree.

2009-12-02T01:52:47+00:00

Lock is held before creating a RBT in inode. Also, did some re-factoring.

Signed-off-by: Vijay Bellur 
Signed-off-by: Anand V. Avati 

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335

Changed rbthash_table_init() to take a mem-pool argument.

2009-11-26T12:32:25+00:00

Changes in libglusterfs/rbthash:

rbthash_table_init() now takes a mem-pool argument.
The mem-pool argument would be mutually exclusive to expected_entries.
If expected_entries is provided, mem-pool would be ignored and vice-versa.

Changes in io-cache:
1) Moved rbthash creation to readv.
2) rbthash makes use of 1 rbt instead of 4096
3) A global mem-pool is being used in place of a mem-pool per rbt.

Signed-off-by: Vijay Bellur 
Signed-off-by: Anand V. Avati 

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335

performance/io-cache: use STACK_UNWIND_STRICT for unwinding.

2009-11-24T12:36:54+00:00

Signed-off-by: Raghavendra G 
Signed-off-by: Anand V. Avati 

BUG: 269 (Add a specialized STACK_UNWIND macro for each FOP)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=269

performance/io-cache: don't use stat got in read_cbk if it is zero-filled.

2009-11-20T13:02:43+00:00

- translators like io-cache, read-ahead return a zero-filled stbuf in
    readv_cbk and usage of zero filled stat for cache validation is not
    correct.

Signed-off-by: Raghavendra G 
Signed-off-by: Anand V. Avati 

BUG: 376 (server-side io-cache is preventing client-side io-cache from working)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=376

performance/io-cache: change the data-types to be big enough to hold size of data flushed.

2009-10-30T08:49:53+00:00

Signed-off-by: Anand V. Avati 

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335

performance/io-cache: change the hash function used for rbtree based hash table.

2009-10-29T17:07:49+00:00

- the earlier hash function does not distribute pages uniformly for offsets that
    fit into 32 bits. The reason is that the hash function just xors the contents of
    the key 4 bytes at a time with the current value of hash. Hence for keys that
    fit into 32 bits, the hash will be the key itself. Since we are using the
    rounded_offset (which is a multiple of 128KB) as the key, the key will
    be exactly divisible by the number of buckets configured (4096) resolving all
    the pages into the first bucket.

Signed-off-by: Anand V. Avati 

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335

libglusterfs/rbtree: change rbthash_init_table to take no of expected entries in the hash table as argument.

2009-10-29T06:00:39+00:00

- the expected number of entries is used to create the memory pool of the hash
    table. Having constant macro for this purpose is not suitable since different
    users of rbtree based hash table store different number of entries in the
    table.

Signed-off-by: Anand V. Avati 

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335

performance/io-cache: fix memory leak.

2009-10-29T06:00:35+00:00

- page table of cache was not being destroyed in ioc_forget.

Signed-off-by: Anand V. Avati 

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335