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bcachefs: BCH_WATERMARK_interior_updates
This adds a new watermark, higher priority than BCH_WATERMARK_reclaim, for interior btree updates. We've seen a deadlock where journal replay triggers a ton of btree node merges, and these use up all available open buckets and then interior updates get stuck. One cause of this is that we're currently lacking btree node merging on write buffer btrees - that needs to be fixed as well. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Kent Overstreet
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Apr 2, 2024
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