linux-stable.git/fs/bcachefs/debug.c, branch v6.9 Linux kernel stable tree bcachefs: Move btree_updates to debugfs 2024-04-04T20:56:44+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-04-03T23:15:53+00:00 9fb3036fe3d9414ae32a97d01d7ccf7550e168a7 sysfs is limited to PAGE_SIZE, and when we're debugging strange deadlocks/priority inversions we need to see the full list. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
sysfs is limited to PAGE_SIZE, and when we're debugging strange
deadlocks/priority inversions we need to see the full list.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: create debugfs dir for each btree 2024-04-04T00:32:10+00:00 Thomas Bertschinger tahbertschinger@gmail.com 2024-03-14T16:02:18+00:00 e60aa472400b1ff8d0e6c563a2eb05916927f10a This creates a subdirectory for each individual btree under the btrees/ debugfs directory. Directory structure, before: /sys/kernel/debug/bcachefs/$FS_ID/btrees/ ├── alloc ├── alloc-bfloat-failed ├── alloc-formats ├── backpointers ├── backpointers-bfloat-failed ├── backpointers-formats ... Directory structure, after: /sys/kernel/debug/bcachefs/$FS_ID/btrees/ ├── alloc │   ├── bfloat-failed │   ├── formats │   └── keys ├── backpointers │   ├── bfloat-failed │   ├── formats │   └── keys ... Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
This creates a subdirectory for each individual btree under the btrees/
debugfs directory.

Directory structure, before:

/sys/kernel/debug/bcachefs/$FS_ID/btrees/
├── alloc
├── alloc-bfloat-failed
├── alloc-formats
├── backpointers
├── backpointers-bfloat-failed
├── backpointers-formats
...

Directory structure, after:

/sys/kernel/debug/bcachefs/$FS_ID/btrees/
├── alloc
│   ├── bfloat-failed
│   ├── formats
│   └── keys
├── backpointers
│   ├── bfloat-failed
│   ├── formats
│   └── keys
...

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Improve bch2_fatal_error() 2024-03-18T04:24:24+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-03-18T01:51:19+00:00 3ed94062e3801e3fd9924ccd54b607abf58cc223 error messages should always include __func__ Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
error messages should always include __func__

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: kill kvpmalloc() 2024-03-13T22:39:12+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-02-01T11:35:46+00:00 cb6fc943b650c4f0ca2ba753531c0803c8afbb5c Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Add gfp flags param to bch2_prt_task_backtrace() 2024-01-22T17:37:51+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-01-22T17:25:00+00:00 612e1110d689387aab81b2727895cd307d3cbbfd Fixes: e6a2566f7a00 ("bcachefs: Better journal tracepoints") Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Reported-by: smatch 
Fixes: e6a2566f7a00 ("bcachefs: Better journal tracepoints")
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Reported-by: smatch
bcachefs: Prep work for variable size btree node buffers 2024-01-21T18:27:10+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-01-16T18:29:59+00:00 ec4edd7b9d2038a97e0ba3fad8fc8492b0d12d35 bcachefs btree nodes are big - typically 256k - and btree roots are pinned in memory. As we're now up to 18 btrees, we now have significant memory overhead in mostly empty btree roots. And in the future we're going to start enforcing that certain btree node boundaries exist, to solve lock contention issues - analagous to XFS's AGIs. Thus, we need to start allocating smaller btree node buffers when we can. This patch changes code that refers to the filesystem constant c->opts.btree_node_size to refer to the btree node buffer size - btree_buf_bytes() - where appropriate. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
bcachefs btree nodes are big - typically 256k - and btree roots are
pinned in memory. As we're now up to 18 btrees, we now have significant
memory overhead in mostly empty btree roots.

And in the future we're going to start enforcing that certain btree node
boundaries exist, to solve lock contention issues - analagous to XFS's
AGIs.

Thus, we need to start allocating smaller btree node buffers when we
can. This patch changes code that refers to the filesystem constant
c->opts.btree_node_size to refer to the btree node buffer size -
btree_buf_bytes() - where appropriate.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: Improve would_deadlock trace event 2024-01-06T04:24:21+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-01-04T23:59:17+00:00 c13fbb7de2fc4fd61a44ebfa4ba182f35e0a3286 We now include backtraces for every thread involved in the cycle. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
We now include backtraces for every thread involved in the cycle.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: kill useless return ret 2024-01-06T04:24:20+00:00 Kent Overstreet kent.overstreet@linux.dev 2024-01-03T18:44:43+00:00 8a0dda6fd6b7af2a7aa797762148b8ecb8f47a67 Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: track transaction durations 2024-01-06T04:24:19+00:00 Kent Overstreet kent.overstreet@linux.dev 2023-12-24T03:43:33+00:00 89056f245bce2cb833726927783337c5dc59eac0 Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: optimize __bch2_trans_get(), kill DEBUG_TRANSACTIONS 2024-01-01T16:47:44+00:00 Kent Overstreet kent.overstreet@linux.dev 2023-12-11T16:11:22+00:00 31403dca5bb1e55ea0ea6ad1264b81fa8c9a3768 - Some tweaks to greatly reduce locking overhead for the list of btree transactions, so that it can always be enabled: leave btree_trans objects on the list when they're on the percpu single item freelist, and only check for duplicates in the same process when CONFIG_BCACHEFS_DEBUG is enabled - don't zero out the full btree_trans() unless we allocated it from the mempool Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> 
 - Some tweaks to greatly reduce locking overhead for the list of btree
   transactions, so that it can always be enabled: leave btree_trans
   objects on the list when they're on the percpu single item freelist,
   and only check for duplicates in the same process when
   CONFIG_BCACHEFS_DEBUG is enabled

 - don't zero out the full btree_trans() unless we allocated it from
   the mempool

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>