Hi,

I will fix all on next version. Thank you very much.

On 2019-03-06 09:14, Randy Dunlap wrote:

Hi,

On 2/27/19 11:12 PM, liaoweixiong wrote:

quoted

diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index defcb75..7dfe00b 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig

@@ -160,3 +160,117 @@ config PSTORE_BLK
 	help
 	  This enables panic and oops message to be logged to a block dev
 	  where it can be read back at some later point.
+
+config PSTORE_BLKOOPS
+	tristate "pstore block with oops logger"
+	depends on PSTORE_BLK
+	help
+	  This is a sample for pstore block with oops logger.
+
+	  It CANNOT record panic log as no read/write apis for panic registered.

	                                              APIs

Fixed.

quoted

+
+	  It CAN record oops log even power failure if
+	  "PSTORE_BLKOOPS_BLKDEV" on Kconfig or "block-device" on dts or
+	  "blkdev" on module parameter is valid.
+
+	  Otherwise, it can only record data to ram buffer, which will be
+	  dropped when reboot.

	  dropped on reboot.
or
	  dropped when rebooting.

Fixed.

quoted

+
+	  NOTE that, there are three ways to set parameters of blkoops and
+	  prioritize according to configuration flexibility. That is
+	  Kconfig < device tree < module parameters. It means that the value can
+	  be overwritten by higher priority settings.
+	  1. Kconfig
+	     It	just sets a default value.
+	  2. device tree
+	     It is set on device tree, which will overwrites value from Kconfig,

	                                          overwrite the value from Kconfig,

Fixed.

quoted

+	     but can also be overwritten by module parameters.
+	  3. module parameters
+	     It is the first priority. Take care of that blkoops will take lower
+	     priority settings if higher priority one do not set.
+
+config PSTORE_BLKOOPS_DMESG_SIZE
+	int "dmesg size in kbytes for blkoops"
+	depends on PSTORE_BLKOOPS
+	default 64
+	help
+	  This just sets size of dmesg (dmesg_size) for pstore/blk. The value
+	  must be a multiple of 4096.
+
+	  NOTE that, there are three ways to set parameters of blkoops and
+	  prioritize according to configuration flexibility. That is
+	  Kconfig < device tree < module parameters. It means that the value can
+	  be overwritten by higher priority settings.
+	  1. Kconfig
+	     It	just sets a default value.
+	  2. device tree
+	     It is set on device tree, which will overwrites value from Kconfig,

	                                          overwrite the value from Kconfig,

It cancels device tree support. I forget to delete it.

quoted

+	     but can also be overwritten by module parameters.
+	  3. module parameters
+	     It is the first priority. Take care of that blkoops will take lower
+	     priority settings if higher priority one do not set.
+
+config PSTORE_BLKOOPS_TOTAL_SIZE
+	int "total size in kbytes for blkoops"
+	depends on PSTORE_BLKOOPS
+	default 0
+	help
+	  The total size in kbytes pstore/blk can use. It must be less than or
+	  equal to size of block device if @blkdev valid. If @total_size is zero
+	  with @blkdev, @total_size will be set to equal to size of @blkdev.

	                                    set equal to size of @blkdev.

Fixed.

quoted

+	  The value must be a multiple of 4096.
+
+	  NOTE that, there are three ways to set parameters of blkoops and
+	  prioritize according to configuration flexibility. That is
+	  Kconfig < device tree < module parameters. It means that the value can
+	  be overwritten by higher priority settings.
+	  1. Kconfig
+	     It	just sets a default value.
+	  2. device tree
+	     It is set on device tree, which will overwrites value from Kconfig,

	                                          overwrite the value from Kconfig,

Fixed.

quoted

+	     but can also be overwritten by module parameters.
+	  3. module parameters
+	     It is the first priority. Take care of that blkoops will take lower
+	     priority settings if higher priority one do not set.
+
+config PSTORE_BLKOOPS_BLKDEV
+	string "block device for blkoops"
+	depends on PSTORE_BLKOOPS
+	default ""
+	help
+	  This just sets block device (blkdev) for pstore/blk. Pstore/blk
+	  will record data to this block device to avoid losing data due to
+	  power failure. So, If it is not set, pstore/blk will drop all data

	                     if

Fixed.

quoted

+	  when reboot.

	  on reboot.

Fixed.

quoted

+
+	  It accpet the following variants:

	     accepts

Fixed.

quoted

+	  1) <hex_major><hex_minor> device number in hexadecimal represents
+	     itself no leading 0x, for example b302.
+	  2) /dev/<disk_name> represents the device number of disk
+	  3) /dev/<disk_name><decimal> represents the device number
+	     of partition - device number of disk plus the partition number
+	  4) /dev/<disk_name>p<decimal> - same as the above, that form is

	                                              above; this form is

Fixed.

quoted

+	     used when disk name of partitioned disk ends on a digit.

	                                             ends with a digit.

Fixed.

quoted

+	  5) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
+	     unique id of a partition if the partition table provides it.
+	     The UUID may be either an EFI/GPT UUID, or refer to an MSDOS
+	     partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero-
+	     filled hex representation of the 32-bit "NT disk signature", and PP
+	     is a zero-filled hex representation of the 1-based partition number.
+	  6) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation
+	     to a partition with a known unique id.
+	  7) <major>:<minor> major and minor number of the device separated by
+	     a colon.
+
+	  NOTE that, there are three ways to set parameters of blkoops and
+	  prioritize according to configuration flexibility. That is
+	  Kconfig < device tree < module parameters. It means that the value can
+	  be overwritten by higher priority settings.
+	  1. Kconfig
+	     It	just sets a default value.
+	  2. device tree
+	     It is set on device tree, which will overwrites value from Kconfig,

	                                          overwrite the value from Kconfig,

Fixed.

quoted

+	     but can also be overwritten by module parameters.
+	  3. module parameters
+	     It is the first priority. Take care of that blkoops will take lower
+	     priority settings if higher priority one do not set.

-- 
liaoweixiong