linux-kernel - [PATCH] scsi: pm8001: Increase request sg length to support 4MiB requests

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241024001026.1842458-1-ipylypiv@google.com>
Date: Thu, 24 Oct 2024 00:10:26 +0000
From: Igor Pylypiv <ipylypiv@...gle.com>
To: Jack Wang <jinpu.wang@...ud.ionos.com>, 
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, 
	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Igor Pylypiv <ipylypiv@...gle.com>
Subject: [PATCH] scsi: pm8001: Increase request sg length to support 4MiB requests

Increasing the per-request size maximum (max_sectors_kb) to 4096 KiB
runs into the per-device DMA scatter gather list limit (max_segments)
for users of the io vector system calls (e.g. readv and writev).

This change increases the max scatter gather list length to 1024 to
enable kernel to send 4MiB (1024 * 4KiB page size) requests.

Signed-off-by: Igor Pylypiv <ipylypiv@...gle.com>
---
 drivers/scsi/pm8001/pm8001_defs.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/pm8001/pm8001_defs.h b/drivers/scsi/pm8001/pm8001_defs.h
index 501b574239e8..f6e6fe3f4cd6 100644
--- a/drivers/scsi/pm8001/pm8001_defs.h
+++ b/drivers/scsi/pm8001/pm8001_defs.h
@@ -92,8 +92,7 @@ enum port_type {
 #define	PM8001_MAX_MSIX_VEC	 64	/* max msi-x int for spcv/ve */
 #define	PM8001_RESERVE_SLOT	 8
 
-#define	CONFIG_SCSI_PM8001_MAX_DMA_SG	528
-#define PM8001_MAX_DMA_SG	CONFIG_SCSI_PM8001_MAX_DMA_SG
+#define PM8001_MAX_DMA_SG	1024
 
 enum memory_region_num {
 	AAP1 = 0x0, /* application acceleration processor */
-- 
2.47.0.105.g07ac214952-goog