bcachefs: Fix deadlock in journal write path

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bch2_journal_write() was incorrectly waiting on earlier journal writes
synchronously; this usually worked because most of the time we'd be
running in the context of a thread that did a journal_buf_put(), but
sometimes we'd be running out of the same workqueue that completes those
prior journal writes.

Additionally, this makes sure to punt to a workqueue before submitting
preflushes - we really don't want to be calling submit_bio() in the main
transaction commit path.

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

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This commit is contained in:

Kent Overstreet 2024-04-19 21:54:32 -04:00

parent adfe9357c3

commit 85ab365f7c

1 changed files with 42 additions and 18 deletions

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fs/bcachefs/journal_io.c

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