On 06/12/2015 01:46 PM, David Teigland wrote:
When a node fails, its dirty areas get special treatment from other nodes using the area_resyncing() function. Should the suspend_list be created before any reads or writes from the file system are processed by md? It seems to me that gfs journal recovery could read/write to dirty regions (from the failed node) before md was finished setting up the suspend_list. md could probably prevent that by using the recover_prep() dlm callback to set a flag that would block any i/o that arrived before the suspend_list was ready. .
Yes, we should call mddev_suspend() in recover_prep() and mddev_resume() after suspend_list is created. Thanks for pointing it out.
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