> -----Original Message----- > From: Kashyap Desai [mailto:kashyap.desai@xxxxxxxxxxxx] > Sent: Monday, November 15, 2021 10:02 PM > To: 'John Garry' <john.garry@xxxxxxxxxx>; 'axboe@xxxxxxxxx' > <axboe@xxxxxxxxx> > Cc: 'linux-block@xxxxxxxxxxxxxxx' <linux-block@xxxxxxxxxxxxxxx>; 'linux- > kernel@xxxxxxxxxxxxxxx' <linux-kernel@xxxxxxxxxxxxxxx>; > 'ming.lei@xxxxxxxxxx' > <ming.lei@xxxxxxxxxx>; 'hare@xxxxxxx' <hare@xxxxxxx> > Subject: RE: [PATCH RFT 0/3] blk-mq: Optimise blk_mq_queue_tag_busy_iter() > for shared tags > > > Hi Kashyap, > > > > Any chance you can try this series or give an update on the issue > > reported earlier? > > John - > > I will try something this week and let you know. John - I tested patchset and looks good. Issue reported at below thread is fixed. https://lore.kernel.org/linux-block/e4e92abbe9d52bcba6b8cc6c91c442cc@xxxxxxxxxxxxxx/ Here is perf top data. 5.70% [megaraid_sas] [k] complete_cmd_fusion 3.80% [megaraid_sas] [k] megasas_build_and_issue_cmd_fusion 2.75% [kernel] [k] syscall_return_via_sysret 2.68% [kernel] [k] entry_SYSCALL_64 2.22% [kernel] [k] io_submit_one 2.19% [megaraid_sas] [k] megasas_build_ldio_fusion 1.95% [kernel] [k] llist_add_batch 1.80% [kernel] [k] llist_reverse_order 1.79% [kernel] [k] scsi_complete 1.73% [kernel] [k] scsi_queue_rq 1.66% [kernel] [k] check_preemption_disabled 1.37% [megaraid_sas] [k] megasas_queue_command 1.16% [kernel] [k] native_irq_return_iret 1.11% [kernel] [k] aio_complete_rw 1.07% [kernel] [k] read_tsc 1.06% fio [.] __fio_gettime 1.05% [kernel] [k] flush_smp_call_function_queue 1.03% [kernel] [k] blk_complete_reqs 1.00% [kernel] [k] blk_mq_free_request 0.98% [kernel] [k] sbitmap_get I will continue testing and let you know how it goes. Kashyap > > > > > thanks @ Ming for the reviews. > > > > Cheers, > > John > >
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