bcachefs: Mark write locks before taking lock

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six locks are unfair: while a thread is blocked trying to take a write
lock, new read locks will fail. The new deadlock cycle detector makes
use of our existing lock tracing, so we need to tell it we're holding a
write lock before we take the lock for it to work correctly.

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

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This commit is contained in:

Kent Overstreet 2022-08-26 14:55:00 -04:00

parent 534a591e4c

commit 546180874a

2 changed files with 16 additions and 4 deletions

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9

fs/bcachefs/btree_locking.h

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11

fs/bcachefs/btree_update_leaf.c

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