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Bug 2044684

Summary:	scsi: core: Make sure sdev->queue_depth is <= max(shost->can_queue, 1024)
Product:	Red Hat Enterprise Linux 9	Reporter:	Ming Lei <minlei>
Component:	kernel	Assignee:	Ewan D. Milne <emilne>
kernel sub component:	Storage Drivers	QA Contact:	Storage QE <storage-qe>
Status:	CLOSED NEXTRELEASE	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	emilne, minlei, revers, storage-qe
Version:	9.0	Keywords:	Bugfix
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	kernel-5.14.0-92.el9	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	2044683	Environment:
Last Closed:	2022-05-17 17:00:56 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2044683
Bug Blocks:

Description Ming Lei 2022-01-25 01:40:59 UTC

+++ This bug was initially created as a clone of Bug #2044683 +++

Description of problem:

https://lore.kernel.org/linux-scsi/20211203231950.193369-2-bvanassche@acm.org/

https://lore.kernel.org/linux-scsi/be78dc2cfeecaafd171060fbebda2d268d2a94e5.camel@suse.com/

This way may take huge much memory for allocating ->budget_map for some
scsi host controllers, and even cause allocation failure, see the report
above.


Version-Release number of selected component (if applicable):


How reproducible:

100%


Steps to Reproduce:


Actual results:


Expected results:


Additional info:

Comment 1 Ewan D. Milne 2022-05-17 17:00:56 UTC

Should be fixed by 9.1 SCSI update, see bug 2071032

scsi: core: Fix sbitmap depth in scsi_realloc_sdev_budget_map()
lib/sbitmap: allocate sb->map via kvzalloc_node
scsi: core: Reallocate device's budget map on queue depth change
scsi: core: Fix scsi_device_max_queue_depth()

Also see earlier patch to 9.0 by Ming that reduced the size of struct sbitmap_word

lib/sbitmap: kill 'depth' from sbitmap_word