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: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20231113160751.620810-1-debug.penguin32@gmail.com>
Date:   Tue, 14 Nov 2023 02:07:49 +1000
From:   Ronald Monthero <debug.penguin32@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     richard@....at, vigneshr@...com, heiko@...ech.de,
        martin.blumenstingl@...glemail.com, paul@...pouillou.net,
        robh@...nel.org, u.kleine-koenig@...gutronix.de,
        debug.penguin32@...il.com, AVKrasnov@...rdevices.ru,
        r.czerwinski@...gutronix.de, andriy.shevchenko@...ux.intel.com,
        jaimeliao.tw@...il.com, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Philippe Mathieu-Daudé <philmd@...aro.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>
Subject: [PATCH v2] mtd: rawnand: Increment IFC_TIMEOUT_MSECS for nand controller response

Under heavy load it is likely that the controller is done
with its own task but the thread unlocking the wait is not
scheduled in time. Increasing IFC_TIMEOUT_MSECS allows the
controller to respond within allowable timeslice of 1 sec

fsl,ifc-nand 7e800000.nand: Controller is not responding
main/smp_fsm.c:1884 <inrcu: rcu_preempt detected stalls on CPUs/tasks:
rcu:    Tasks blocked on level-0 rcu_node (CPUs 0-1): P116/2:b..l
        (detected by 1, t=2102 jiffies, g=7729, q=754)
task:irq/31-arm-irq1 state:D stack: 0 pid: 116 ppid: 2 flags:0x00000000
[<8064b97f>] (__schedule) from [<8064bb01>] (schedule+0x8d/0xc2)
[<8064bb01>] (schedule) from [<8064dacd>]
[<8064dacd>] (rt_mutex_slowlock_block.constprop.0) from [<8064db57>]
[<8064db57>] (__rt_mutex_slowlock.constprop.0) from [<8064dbf7>]
[<8064dbf7>] (rt_mutex_slowlock.constprop.0) from [<804b2047>]
[<804b2047>] (nand_get_device) from [<804b5335>] (nand_write_oob+0x1b/0x4a)
[<804b5335>] (nand_write_oob) from [<804a3585>] (mtd_write+0x41/0x5c)
[<804a3585>] (mtd_write) from [<804c1d47>] (ubi_io_write+0x17f/0x22c)
[<804c1d47>] (ubi_io_write) from [<804c047b>] (ubi_eba_write_leb+0x5b/0x1d0)

Cc: stable@...r.kernel.org
Signed-off-by: Ronald Monthero <debug.penguin32@...il.com>
---
 drivers/mtd/nand/raw/fsl_ifc_nand.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/fsl_ifc_nand.c b/drivers/mtd/nand/raw/fsl_ifc_nand.c
index 20bb1e0cb5eb..42f8ea46b6a8 100644
--- a/drivers/mtd/nand/raw/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_ifc_nand.c
@@ -21,7 +21,7 @@
 
 #define ERR_BYTE		0xFF /* Value returned for read
 					bytes when read failed	*/
-#define IFC_TIMEOUT_MSECS	500  /* Maximum number of mSecs to wait
+#define IFC_TIMEOUT_MSECS	1000  /* Maximum number of mSecs to wait
 					for IFC NAND Machine	*/
 
 struct fsl_ifc_ctrl;
-- 
2.34.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ