答复: [RFC] Significant Random I/O Performa nce Regression in Linux Kernel 6.18 (Up to 27 .7%) Likely Caused by Commit 3c7ac40d7322

We have already included these two fixes, which are related to stability. The issue we're encountering is performance-related

Thank You.

-----邮件原件-----
发件人: Bart Van Assche <[email protected]> 
发送时间: 2026年7月10日 22:56
收件人: 孙魁 (Kui Sun) <[email protected]>; Neil Armstrong <[email protected]>; Alim Akhtar <[email protected]>; Avri Altman <[email protected]>; James E.J. Bottomley <[email protected]>; Martin K. Petersen <[email protected]>; [email protected]
抄送: Peter Griffin <[email protected]>; Tudor Ambarus <[email protected]>; Will McVicker <[email protected]>; Manivannan Sadhasivam <[email protected]>; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; 张如泉 (Rain Zhang) <[email protected]>; [email protected]; 唐月林 (Yuelin Tang) <[email protected]>; 陈文超 (Wenchao Chen) <[email protected]>; André Draszik <[email protected]>
主题: Re: [RFC] Significant Random I/O Performance Regression in Linux Kernel 6.18 (Up to 27.7%) Likely Caused by Commit 3c7ac40d7322


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On 7/10/26 12:17 AM, 孙魁 (Kui Sun) wrote:
> Through investigation, we identified that upstream commit 
> 3c7ac40d732232fec0ba31d0a5e3cc9c112fc2e7, merged in April 2025, is 
> likely responsible for this performance drop.
Two fixes for that commit are present in the upstream kernel. Are these fixes present in your kernel tree?

commit eabcac808ca3ee9878223d4b49b750979029016b
Author: Bart Van Assche <[email protected]>
Date:   Fri Aug 15 08:58:23 2025 -0700

     scsi: ufs: core: Fix IRQ lock inversion for the SCSI host lock

commit 034d319c8899e8c5c0a35c6692c7fc7e8c12c374
Author: Nitin Rawat <[email protected]>
Date:   Tue Jul 29 04:27:11 2025 +0530

     scsi: ufs: core: Fix interrupt handling for MCQ Mode

Thanks,

Bart.