From: Gavin Shan <gshan@redhat.com>
To: Ben Horgan <ben.horgan@arm.com>
Cc: james.morse@arm.com, reinette.chatre@intel.com,
fenghuay@nvidia.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, dave.martin@arm.com,
andre.przywara@arm.com
Subject: Re: [PATCH v2 08/12] arm_mpam: resctrl: Correct check that existing class is L3
Date: Tue, 22 Sep 2026 15:43:26 +1000 [thread overview]
Message-ID: <46f77ab6-4f7a-4a40-b0e5-3ea92659d7a2@redhat.com> (raw)
In-Reply-To: <20260917145617.2202986-9-ben.horgan@arm.com>
On 9/18/26 12:56 AM, Ben Horgan wrote:
> The class used to back mbm_total_bytes can be either at the L3 or the
> memory. If a platform had candidate classes at both the memory and the L3
> then, as the check for whether the existing class is L3 or not in
> counter_update_class() is broken, the class that will be chosen depends on
> which order the classes are considered and so the probe order.
>
> Fix the check.
>
> Fixes: 1458c4f05335 ("arm_mpam: resctrl: Add support for csu counters")
> Tested-by: Gavin Shan <gshan@redhat.com>
> Signed-off-by: Ben Horgan <ben.horgan@arm.com>
> ---
> drivers/resctrl/mpam_resctrl.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
Reviewed-by: Gavin Shan <gshan@redhat.com>
next prev parent reply other threads:[~2026-09-22 5:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 14:56 [PATCH v2 00/12] arm_mpam: minor fixes at v7.2 Ben Horgan
2026-09-17 14:56 ` [PATCH v2 01/12] arm_mpam: Move MPAMF_ECR write helpers to allow reuse Ben Horgan
2026-09-22 5:41 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 02/12] arm_mpam: Restore the error interrupt enable from mpam_cpu_online() Ben Horgan
2026-09-22 5:42 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 03/12] arm_mpam: Set mpam_feat_msmon_mbwu_31counter when there are bandwidth counters Ben Horgan
2026-09-22 5:42 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 04/12] arm_mpam: Add missing mon_sel locking in MBWU save and restore Ben Horgan
2026-09-17 14:56 ` [PATCH v2 05/12] arm_mpam: Ensure MBWU counters are reset on restore Ben Horgan
2026-09-22 5:43 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 06/12] arm_mpam: Use __ris_msmon_read() for saving MBWU state Ben Horgan
2026-09-17 14:56 ` [PATCH v2 07/12] arm_mpam: Initialize all of struct mon_read in mpam_restore_mbwu_state() Ben Horgan
2026-09-17 14:56 ` [PATCH v2 08/12] arm_mpam: resctrl: Correct check that existing class is L3 Ben Horgan
2026-09-22 5:43 ` Gavin Shan [this message]
2026-09-17 14:56 ` [PATCH v2 09/12] arm_mpam: resctrl: Make read_mon_cdp_safe() self consistent Ben Horgan
2026-09-22 5:44 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 10/12] arm_mpam: Don't loop forever if there is the maximum possible amount of PARTIDs Ben Horgan
2026-09-22 5:44 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 11/12] arm_mpam: Switch to kvzmalloc_objs() for allocation of component cfg Ben Horgan
2026-09-22 5:45 ` Gavin Shan
2026-09-17 14:56 ` [PATCH v2 12/12] arm_mpam: resctrl: Don't stop early when tearing down a class Ben Horgan
2026-09-22 5:45 ` Gavin Shan
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