linux-toradex.git/drivers/md/bcache/journal.c, branch v4.0.7

bcache: Fix an infinite loop in journal replay

2014-08-04T22:23:03+00:00

When running with multiple cache devices, if one of the devices has a completely
empty journal but we'd already found some journal entries on a previosu device
we'd go into an infinite loop.

Change-Id: I1dcdc0d738192746de28f40e8b08825b0dea5e2b
Signed-off-by: Kent Overstreet

bcache: Fix to remove the rcu_sched stalls.

2014-08-04T22:23:02+00:00

while loop was executing infinitely.
This fix ends the while loop gracefully.

Signed-off-by: Surbhi Palande 
Signed-off-by: Kent Overstreet

bcache: Fix a journal replay bug

2014-08-04T22:23:02+00:00

journal replay wansn't validating pointers with bch_extent_invalid() before
derefing, fixed

Signed-off-by: Kent Overstreet

bcache: btree locking rework

2014-03-18T19:23:35+00:00

Add a new lock, b->write_lock, which is required to actually modify - or write -
a btree node; this lock is only held for short durations.

This means we can write out a btree node without taking b->lock, which _is_ held
for long durations - solving a deadlock when btree_flush_write() (from the
journalling code) is called with a btree node locked.

Right now just occurs in bch_btree_set_root(), but with an upcoming journalling
rework is going to happen a lot more.

This also turns b->lock is now more of a read/intent lock instead of a
read/write lock - but not completely, since it still blocks readers. May turn it
into a real intent lock at some point in the future.

Signed-off-by: Kent Overstreet

bcache: Add bch_keylist_init_single()

2014-03-18T19:22:36+00:00

This will potentially save us an allocation when we've got inode/dirent bkeys
that don't fit in the keylist's inline keys.

Signed-off-by: Kent Overstreet

bcache: Fix another bug recovering from unclean shutdown

2014-03-18T19:22:33+00:00

The on disk bucket gens are allowed to be out of date, when we reuse buckets
that didn't have any live data in them. To deal with this, the initial gc has to
update the bucket gen when we find a pointer gen newer than the bucket's gen.

Unfortunately we weren't doing this for pointers in the journal that we're about
to replay.

Signed-off-by: Kent Overstreet

bcache: Fix a journalling reclaim after recovery bug

2014-03-18T19:21:48+00:00

On recovery we weren't correctly keeping track of what journal buckets had open
journal entries, thus it was possible for them to be overwritten until we'd
written all new journal entries.

Signed-off-by: Kent Overstreet

bcache: Fix a null ptr deref in journal replay

2014-03-18T02:01:03+00:00

Signed-off-by: Kent Overstreet

bcache: Fix a shutdown bug

2014-02-26T02:42:49+00:00

Shutdown wasn't cancelling/waiting on journal_write_work()

Signed-off-by: Kent Overstreet

bcache: Rename/shuffle various code around

2014-01-08T21:05:12+00:00

More work to disentangle bset.c from the rest of the code:

Signed-off-by: Kent Overstreet