Hi Martin, Due to some issue in RCU lock (only in debugging environments), there was booting issue and shared host tag support of megaraid_sas driver is revert backed in 5.10 - https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit /?id=1a0e1943d8798cb3241fb5edb9a836af1611b60a == Commit message == It turns out that it causes long boot-time latencies (to the point of timeouts and failed boots). The cause is the increase in request queues, and a fix for that is queued up for 5.11, but we're reverting this commit that triggered the problem for now. == Can you include this patch set for 5.11 ? I see (origin/5.11/scsi-queue) has below change set. It looks like you have already queued up "shared host tag feature for 5.11" git log --oneline drivers/scsi/megaraid/ 498854102c1c scsi: megaraid_sas: Update function description 977001df0368 scsi: megaraid_sas: Use generic power management 8ed9d987c6d9 scsi: megaraid_sas: Drop PCI wakeup calls from .resume bba84aeccafb scsi: megaraid_sas: Simplify compat_ioctl handling 381d34e376e3 scsi: megaraid_sas: Check user-provided offsets 55e0500eb5c0 Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi 103fbf8e4020 scsi: megaraid_sas: Added support for shared host tagset for cpuhotplug 62aa501dc9dd scsi: megaraid: Make smp_affinity_enable static Kashyap > -----Original Message----- > From: Kashyap Desai [mailto:kashyap.desai@xxxxxxxxxxxx] > Sent: Thursday, December 3, 2020 9:11 AM > To: linux-scsi@xxxxxxxxxxxxxxx > Cc: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx> > Subject: [PATCH v2 0/4] io_uring iopoll in scsi layer > > This patch series is to support io_uring iopoll feature in scsi stack. This patch > set requires shared hosttag support. > > This patch set is created on top of for-next branch of > https://kernel.googlesource.com/pub/scm/linux/kernel/git/axboe/linux-block > > v2 -> > - updated feedback from v1. > - add reviewed-by & tested-by tag > - remove flood of prints in scsi_debug driver during iopoll > reported by Douglas Gilbert. > - added new patch to support to get shost from hctx. > added new helper function "scsi_init_hctx" > > v1 -> > Fixed warnings in scsi_debug driver. > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > Kashyap Desai (4): > add io_uring with IOPOLL support in scsi layer > megaraid_sas: iouring iopoll support > scsi_debug : iouring iopoll support > scsi: set shost as hctx driver_data > > drivers/scsi/megaraid/megaraid_sas.h | 2 + > drivers/scsi/megaraid/megaraid_sas_base.c | 90 ++++++++++++-- > drivers/scsi/megaraid/megaraid_sas_fusion.c | 43 ++++++- > drivers/scsi/megaraid/megaraid_sas_fusion.h | 3 + > drivers/scsi/scsi_debug.c | 130 ++++++++++++++++++++ > drivers/scsi/scsi_lib.c | 28 ++++- > include/scsi/scsi_cmnd.h | 1 + > include/scsi/scsi_host.h | 11 ++ > 8 files changed, 294 insertions(+), 14 deletions(-) > > > base-commit: 0eedceafd3a63fd082743c914853ef4b9247dbe6 > -- > 2.18.1 -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it.
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