bcachefs: Fix CPU usage in journal read path

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In journal_entry_add(), we were repeatedly scanning the journal entries
radix tree to scan for old entries that can be freed, with O(n^2)
behaviour. This patch tweaks things to remember the previous last_seq,
so we don't have to scan for entries to free from the start.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

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Kent Overstreet 2022-04-10 16:26:34 -04:00 • committed by Kent Overstreet

parent 6e811bbbc2

commit ec7ccbde6b

1 changed files with 30 additions and 43 deletions

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fs/bcachefs/journal_io.c

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