All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ming Lei <ming.lei@redhat.com>
To: Aaron Tomlin <atomlin@atomlin.com>
Cc: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me,
	mst@redhat.com, aacraid@microsemi.com,
	James.Bottomley@hansenpartnership.com,
	martin.petersen@oracle.com, liyihang9@h-partners.com,
	kashyap.desai@broadcom.com, sumit.saxena@broadcom.com,
	shivasharan.srikanteshwara@broadcom.com,
	chandrakanth.patil@broadcom.com, sathya.prakash@broadcom.com,
	sreekanth.reddy@broadcom.com,
	suganath-prabu.subramani@broadcom.com, ranjan.kumar@broadcom.com,
	jinpu.wang@cloud.ionos.com, tglx@kernel.org, mingo@redhat.com,
	peterz@infradead.org, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, akpm@linux-foundation.org,
	maz@kernel.org, ruanjinjie@huawei.com, bigeasy@linutronix.de,
	yphbchou0911@gmail.com, wagi@kernel.org, frederic@kernel.org,
	longman@redhat.com, chenridong@huawei.com, hare@suse.de,
	kch@nvidia.com, steve@abita.co, sean@ashe.io, chjohnst@gmail.com,
	neelx@suse.com, mproche@gmail.com, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org, virtualization@lists.linux.dev,
	linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org,
	megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com,
	MPT-FusionLinux.pdl@broadcom.com
Subject: Re: [PATCH v9 00/13] blk: honor isolcpus configuration
Date: Tue, 31 Mar 2026 09:01:48 +0800	[thread overview]
Message-ID: <acsc_GHv7Q04U1db@fedora> (raw)
In-Reply-To: <20260330221047.630206-1-atomlin@atomlin.com>

On Mon, Mar 30, 2026 at 06:10:34PM -0400, Aaron Tomlin wrote:
> Hi Jens, Keith, Christoph, Sagi, Michael,
> 
> I have decided to drive this series forward on behalf of Daniel Wagner, the
> original author. This iteration addresses the outstanding architectural and
> concurrency concerns raised during the previous review cycle, and the series
> has been rebased on v7.0-rc5-509-g545475aebc2a.
> 
> Building upon prior iterations, this series introduces critical
> architectural refinements to the mapping and affinity spreading algorithms
> to guarantee thread safety and resilience against concurrent CPU-hotplug
> operations. Previously, the block layer relied on a shared global static
> mask (i.e., blk_hk_online_mask), which proved vulnerable to race conditions
> during rapid hotplug events. This vulnerability was recently highlighted by
> the kernel test robot, which encountered a NULL pointer dereference during
> rcutorture (cpuhotplug) stress testing due to concurrent mask modification.

Can you share the bug report link?

IMO, it should be solved as a backportable patch first if possible.


Thanks,
Ming


  parent reply	other threads:[~2026-03-31  1:02 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-30 22:10 [PATCH v9 00/13] blk: honor isolcpus configuration Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 01/13] scsi: aacraid: use block layer helpers to calculate num of queues Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 02/13] lib/group_cpus: remove dead !SMP code Aaron Tomlin
2026-04-01 12:29   ` Sebastian Andrzej Siewior
2026-04-01 19:31     ` Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 03/13] lib/group_cpus: Add group_mask_cpus_evenly() Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 04/13] genirq/affinity: Add cpumask to struct irq_affinity Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 05/13] blk-mq: add blk_mq_{online|possible}_queue_affinity Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 06/13] nvme-pci: use block layer helpers to constrain queue affinity Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 07/13] scsi: Use " Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 08/13] virtio: blk/scsi: use " Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 09/13] isolation: Introduce io_queue isolcpus type Aaron Tomlin
2026-04-01 12:49   ` Sebastian Andrzej Siewior
2026-04-01 19:05     ` Waiman Long
2026-04-02  7:58       ` Sebastian Andrzej Siewior
2026-04-03  1:54         ` Waiman Long
2026-04-01 20:58     ` Aaron Tomlin
2026-04-02  9:09       ` Sebastian Andrzej Siewior
2026-04-03  0:50         ` Aaron Tomlin
2026-04-03  1:20           ` Ming Lei
2026-03-30 22:10 ` [PATCH v9 10/13] blk-mq: use hk cpus only when isolcpus=io_queue is enabled Aaron Tomlin
2026-03-31 23:05   ` Keith Busch
2026-04-01 17:16     ` Aaron Tomlin
2026-04-03  1:43   ` Ming Lei
2026-03-30 22:10 ` [PATCH v9 11/13] blk-mq: prevent offlining hk CPUs with associated online isolated CPUs Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 12/13] genirq/affinity: Restrict managed IRQ affinity to housekeeping CPUs Aaron Tomlin
2026-03-30 22:10 ` [PATCH v9 13/13] docs: add io_queue flag to isolcpus Aaron Tomlin
2026-03-31  1:01 ` Ming Lei [this message]
2026-03-31 13:38   ` [PATCH v9 00/13] blk: honor isolcpus configuration Aaron Tomlin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=acsc_GHv7Q04U1db@fedora \
    --to=ming.lei@redhat.com \
    --cc=James.Bottomley@hansenpartnership.com \
    --cc=MPT-FusionLinux.pdl@broadcom.com \
    --cc=aacraid@microsemi.com \
    --cc=akpm@linux-foundation.org \
    --cc=atomlin@atomlin.com \
    --cc=axboe@kernel.dk \
    --cc=bigeasy@linutronix.de \
    --cc=chandrakanth.patil@broadcom.com \
    --cc=chenridong@huawei.com \
    --cc=chjohnst@gmail.com \
    --cc=frederic@kernel.org \
    --cc=hare@suse.de \
    --cc=hch@lst.de \
    --cc=jinpu.wang@cloud.ionos.com \
    --cc=juri.lelli@redhat.com \
    --cc=kashyap.desai@broadcom.com \
    --cc=kbusch@kernel.org \
    --cc=kch@nvidia.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-nvme@lists.infradead.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=liyihang9@h-partners.com \
    --cc=longman@redhat.com \
    --cc=martin.petersen@oracle.com \
    --cc=maz@kernel.org \
    --cc=megaraidlinux.pdl@broadcom.com \
    --cc=mingo@redhat.com \
    --cc=mpi3mr-linuxdrv.pdl@broadcom.com \
    --cc=mproche@gmail.com \
    --cc=mst@redhat.com \
    --cc=neelx@suse.com \
    --cc=peterz@infradead.org \
    --cc=ranjan.kumar@broadcom.com \
    --cc=ruanjinjie@huawei.com \
    --cc=sagi@grimberg.me \
    --cc=sathya.prakash@broadcom.com \
    --cc=sean@ashe.io \
    --cc=shivasharan.srikanteshwara@broadcom.com \
    --cc=sreekanth.reddy@broadcom.com \
    --cc=steve@abita.co \
    --cc=suganath-prabu.subramani@broadcom.com \
    --cc=sumit.saxena@broadcom.com \
    --cc=tglx@kernel.org \
    --cc=vincent.guittot@linaro.org \
    --cc=virtualization@lists.linux.dev \
    --cc=wagi@kernel.org \
    --cc=yphbchou0911@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.