>> I had changed console to ttynull and the system doesn't reset again. kernel driver generate lots of error messages when usb storage is disconnected:
>>
>> $ dmesg | grep 'FAT read failed' | wc -l
>>
>> 608
>>
>> usb storage can work again when reconnected.
>>
>> The gpio watchdog depends on hrtimer, maybe printk in ISR delayed hrtimer that cause watchdog reset.
This limits the rate of messages. Can you try if a this patch fixes behavior?
Thanks.
--
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
[PATCH] fat: Add ratelimit to fat*_ent_bread()
fat*_ent_bread() can be the cause of too many report on I/O error
path. So use fat_msg_ratelimit() instead.
Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
---
fs/fat/fatent.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 978ac67..1db348f 100644
--- a/fs/fat/fatent.c 2022-03-28 14:34:04.582208819 +0900
+++ b/fs/fat/fatent.c 2022-03-28 14:39:26.884325073 +0900
@@ -94,7 +94,8 @@ static int fat12_ent_bread(struct super_
err_brelse:
brelse(bhs[0]);
err:
- fat_msg(sb, KERN_ERR, "FAT read failed (blocknr %llu)", (llu)blocknr);
+ fat_msg_ratelimit(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
+ (llu)blocknr);
return -EIO;
}
@@ -107,8 +108,8 @@ static int fat_ent_bread(struct super_bl
fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
fatent->bhs[0] = sb_bread(sb, blocknr);
if (!fatent->bhs[0]) {
- fat_msg(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
- (llu)blocknr);
+ fat_msg_ratelimit(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
+ (llu)blocknr);
return -EIO;
}
fatent->nr_bhs = 1;
_
--
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
