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Re: [dm-devel] [patch] dm-mpath pg_init could race with destructor



Lars Marowsky-Bree wrote:
Why send a pg_init request at this point if there are no queued ios?
This was in fact my solution, to only send a pg_init io if there are
queued ios.


Are there management situations where some admin wants to manually switch. If he was going to take a controller temporarily offline for maitnenance for example? Will multipath tools and dm-mutlipath be used to do this type of management, or will it be some vendor specific tool that sends a SG_IO directly?


It would not be possible to just have dm-multipath increment some refcount like pending so you cannot destroy things while a pg_init IO is in flight would it?


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