On Thu, Nov 12, 2020 at 07:29:13AM -0800, Bart Van Assche wrote: > On 11/12/20 7:12 AM, Bart Van Assche wrote: > > On 11/11/20 11:55 PM, Ming Lei wrote: > >> This reverts commit b3c6a59975415bde29cfd76ff1ab008edbf614a9. > >> > >> Now we can avoid nvme-loop lockdep warning of 'lockdep possible recursive > >> locking' by nvme-loop's lock class, no need to apply dynamically > >> allocated lock class key, so revert commit b3c6a5997541("block: Fix a > >> lockdep complaint triggered by request queue flushing"). > >> > >> This way fixes horrible SCSI probe delay issue on megaraid_sas, and it > >> is reported the whole probe may take more than half an hour. > > > > The code touched by this patch is compiled out with locked disabled so > > it is not clear to me how this patch could affect a probe delay for > > megaraid_sas? Has the megaraid_sas probe issue perhaps not been root > > caused correctly? > > (replying to my own email) > > I found the answer in the descriptions of the previous patches of this > series. I think this patch would benefit from a more complete patch > description. Hello Bart, OK, I can add more words to this commit log. Thanks, Ming