linux-kernel - [PATCH v2 0/2] scsi: ufs: core: interrupt handling optimisations

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Message-Id: <20250725-ufshcd-hardirq-v2-0-884c11e0b0df@linaro.org>
Date: Fri, 25 Jul 2025 15:16:14 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Alim Akhtar <alim.akhtar@...sung.com>, 
 Avri Altman <avri.altman@....com>, Bart Van Assche <bvanassche@....org>, 
 "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, 
 "Martin K. Petersen" <martin.petersen@...cle.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, 
 Manivannan Sadhasivam <mani@...nel.org>, kernel-team@...roid.com, 
 linux-arm-msm@...r.kernel.org, linux-samsung-soc@...r.kernel.org, 
 linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>, 
 stable@...r.kernel.org
Subject: [PATCH v2 0/2] scsi: ufs: core: interrupt handling optimisations

UFS performance for < v4 controllers has reduced quite a bit in 6.16.
This series addresses this regression and brings numbers more or less
back to the previous level.

See patch 2 for some benchmark (fio) results.

Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
Changes in v2:
- patch 1: new patch as suggested by Bart during v1 review
- patch 2: update commit message and some inline & kerneldoc comments
- patch 2: add missing jiffies.h include
- Link to v1: https://lore.kernel.org/r/20250724-ufshcd-hardirq-v1-1-6398a52f8f02@linaro.org

---
André Draszik (2):
      scsi: ufs: core: complete polled requests also from interrupt context
      scsi: ufs: core: move some irq handling back to hardirq (with time limit)

 drivers/ufs/core/ufshcd.c | 211 +++++++++++++++++++++++++++++++++-------------
 1 file changed, 152 insertions(+), 59 deletions(-)
---
base-commit: 58ba80c4740212c29a1cf9b48f588e60a7612209
change-id: 20250723-ufshcd-hardirq-c7326f642e56

Best regards,
-- 
André Draszik <andre.draszik@...aro.org>