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commit6d183de407md/raid5: fix newly-broken locking in get_active_stripe. simplified a BUG_ON, but removed too much so now it sometimes fires when it shouldn't. When the STRIPE_EXPANDING flag is set, the stripe_head might be on a special list while multiple stripe_heads are collected, or it might not be on any list, even a 'free' list when the refcount is zero. As long as STRIPE_EXPANDING is set, it will be found and added back to a list eventually. So both of the BUG_ONs which test for the ->lru being empty or not need to avoid the case where STRIPE_EXPANDING is set. The patch which broke this was marked for -stable, so this patch needs to be applied to any branch that received6d183de4Fixes:6d183de407Cc: stable@vger.kernel.org (any release to which above was applied) Signed-off-by: NeilBrown <neilb@suse.de>
7047 lines
197 KiB
7047 lines
197 KiB