kernel.git/fs/bcachefs/trace.h, branch linux-6.7.y

bcachefs: trace_move_extent_start_fail() now includes errcode

2023-11-28T22:18:24Z

Renamed from trace_move_extent_alloc_mem_fail, because there are other reasons we colud fail (disk space allocation failure). Signed-off-by: Kent Overstreet

bcachefs: Kill journal pre-reservations

2023-11-15T04:44:43Z

This deletes the complicated and somewhat expensive journal pre-reservation machinery in favor of just using journal watermarks: when the journal is more than half full, we run journal reclaim more aggressively, and when the journal is more than 3/4s full we only allow journal reclaim to get new journal reservations. Signed-off-by: Kent Overstreet

bcachefs: Don't downgrade locks on transaction restart

2023-11-02T01:11:08Z

We should only be downgrading locks on success - otherwise, our transaction restarts won't be getting the correct locks and we'll livelock. Signed-off-by: Kent Overstreet

bcachefs: move: move_stats refactoring

2023-10-31T16:18:38Z

data_progress_list is gone - it was redundant with moving_context_list The upcoming rebalance rewrite is going to have it using two different move_stats objects with the same moving_context, depending on whether it's scanning or using the rebalance_work btree - this patch plumbs stats around a bit differently so that will work. Signed-off-by: Kent Overstreet

bcachefs: bch2_btree_id_str()

2023-10-31T16:18:37Z

Since we can run with unknown btree IDs, we can't directly index btree IDs into fixed size arrays. Signed-off-by: Kent Overstreet

bcachefs: trace_read_nopromote()

2023-10-22T21:10:12Z

Add a tracepoint to print the reason a read wasn't promoted. Signed-off-by: Kent Overstreet

bcachefs: Improve btree_path_relock_fail tracepoint

2023-10-22T21:10:11Z

In https://github.com/koverstreet/bcachefs/issues/450, we're seeing unexplained btree_path_relock_fail events - according to the information currently in the tracepoint, it appears the relock should be succeeding. This adds lock counts to the tracepoint to help track it down. Signed-off-by: Kent Overstreet

bcachefs: More drop_locks_do() conversions

2023-10-22T21:10:03Z

Using drop_locks_do() ensures that every unlock() is paired with a relock(), with proper error checking. Signed-off-by: Kent Overstreet

six locks: Kill six_lock_state union

2023-10-22T21:10:02Z

As suggested by Linus, this drops the six_lock_state union in favor of raw bitmasks. On the one hand, bitfields give more type-level structure to the code. However, a significant amount of the code was working with six_lock_state as a u64/atomic64_t, and the conversions from the bitfields to the u64 were deemed a bit too out-there. More significantly, because bitfield order is poorly defined (#ifdef __LITTLE_ENDIAN_BITFIELD can be used, but is gross), incrementing the sequence number would overflow into the rest of the bitfield if the compiler didn't put the sequence number at the high end of the word. The new code is a bit saner when we're on an architecture without real atomic64_t support - all accesses to lock->state now go through atomic64_*() operations. On architectures with real atomic64_t support, we additionally use atomic bit ops for setting/clearing individual bits. Text size: 7467 bytes -> 4649 bytes - compilers still suck at bitfields. Signed-off-by: Kent Overstreet

bcachefs: Improve move path tracepoints

2023-10-22T21:10:00Z

Move path tracepoints now include the key being moved. Also, add new tracepoints for the start of move_extent, and evacuate_bucket. Signed-off-by: Kent Overstreet