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| author |  Kent Overstreet <kent.overstreet@linux.dev>
| 2023-12-11 11:11:22 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev>
| 2024-01-01 11:47:44 -0500 |
| commit | 31403dca5bb1e55ea0ea6ad1264b81fa8c9a3768 (patch) | |
| tree | 91a8417b8242fa3702100c718a829cfc17d1aa2c /fs/bcachefs/btree_locking.c | |
| parent | bcachefs: rcu protect trans->paths (diff) | |
| download | linux-31403dca5bb1e55ea0ea6ad1264b81fa8c9a3768.tar.gz linux-31403dca5bb1e55ea0ea6ad1264b81fa8c9a3768.tar.bz2 linux-31403dca5bb1e55ea0ea6ad1264b81fa8c9a3768.zip | |
bcachefs: optimize __bch2_trans_get(), kill DEBUG_TRANSACTIONS
- 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>
Diffstat (limited to 'fs/bcachefs/btree_locking.c')
| -rw-r--r-- | fs/bcachefs/btree_locking.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/bcachefs/btree_locking.c b/fs/bcachefs/btree_locking.c index d68e1211029d..1ed8327a9fa2 100644 --- a/fs/bcachefs/btree_locking.c +++ b/fs/bcachefs/btree_locking.c @@ -95,9 +95,10 @@ static noinline void print_chain(struct printbuf *out, struct lock_graph *g) struct trans_waiting_for_lock *i; for (i = g->g; i != g->g + g->nr; i++) { + struct task_struct *task = i->trans->locking_wait.task; if (i != g->g) prt_str(out, "<- "); - prt_printf(out, "%u ", i->trans->locking_wait.task->pid); + prt_printf(out, "%u ", task ?task->pid : 0); } prt_newline(out); } |