Re: [PATCH v8 17/18] scsi: megaraid_sas: Added support for shared host tagset for cpuhotplug

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Nov 11, 2020 at 09:42:17AM -0500, Qian Cai wrote:
> On Wed, 2020-11-11 at 17:27 +0800, Ming Lei wrote:
> > Can this issue disappear by applying the following change?
> 
> This makes the system boot again as well.

OK, actually it isn't necessary to register one new lock key for each
hctx(blk_flush_queue) instance, and the current way is really over-kill
because there can be lots of hw queues in one system.

The original lockdep warning can be avoided by setting one nvme_loop
specific lock class simply. If nvme_loop is backed against another nvme_loop,
we still can avoid the warning by killing the direct end io chain, or
assign another lock class.

Will prepare one formal patch tomorrow.

Thanks,
Ming




[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux