How to enable kernel pstore?

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I'm trying to enable the kernel persistent storage (pstore) in order to help debug a module which malfunctions and freezes my laptop on suspend, but I'm having difficulties doing so.
My kernel (4.1.20) config with related parameters is

# gunzip -c /proc/config.gz | grep PSTORE

CONFIG_CHROMEOS_PSTORE=m

CONFIG_PSTORE=y

CONFIG_PSTORE_CONSOLE=y

# CONFIG_PSTORE_PMSG is not set

# CONFIG_PSTORE_FTRACE is not set

CONFIG_PSTORE_RAM=m

I have also tried loading the ramoops module, but when I do

# cat /sys/module/pstore/parameters/backend

(null)

it doesn't seem to have enabled anything. /sys/fs/pstore is empty as well, altough mount says that it is mounted. I have tried to panic my kernel using this but nothing showed up.

What am I doing wrong? Is it even supposed to work on a normal laptop, or am I completely in the dark? I could not find very much while looking for this feature.

asked Mar 31 '16 at 9:29

D.S

40137

bumped to the homepage by Community♦ 2 days ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

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up vote
4
down vote

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# gunzip -c /proc/config.gz | grep PSTORE

CONFIG_CHROMEOS_PSTORE=m

CONFIG_PSTORE=y

CONFIG_PSTORE_CONSOLE=y

# CONFIG_PSTORE_PMSG is not set

# CONFIG_PSTORE_FTRACE is not set

CONFIG_PSTORE_RAM=m

I have also tried loading the ramoops module, but when I do

# cat /sys/module/pstore/parameters/backend

(null)

it doesn't seem to have enabled anything. /sys/fs/pstore is empty as well, altough mount says that it is mounted. I have tried to panic my kernel using this but nothing showed up.

What am I doing wrong? Is it even supposed to work on a normal laptop, or am I completely in the dark? I could not find very much while looking for this feature.

asked Mar 31 '16 at 9:29

D.S

40137

bumped to the homepage by Community♦ 2 days ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

add a comment |

up vote
4
down vote

favorite

# gunzip -c /proc/config.gz | grep PSTORE

CONFIG_CHROMEOS_PSTORE=m

CONFIG_PSTORE=y

CONFIG_PSTORE_CONSOLE=y

# CONFIG_PSTORE_PMSG is not set

# CONFIG_PSTORE_FTRACE is not set

CONFIG_PSTORE_RAM=m

I have also tried loading the ramoops module, but when I do

# cat /sys/module/pstore/parameters/backend

(null)

it doesn't seem to have enabled anything. /sys/fs/pstore is empty as well, altough mount says that it is mounted. I have tried to panic my kernel using this but nothing showed up.

What am I doing wrong? Is it even supposed to work on a normal laptop, or am I completely in the dark? I could not find very much while looking for this feature.

asked Mar 31 '16 at 9:29

D.S

40137

# gunzip -c /proc/config.gz | grep PSTORE

CONFIG_CHROMEOS_PSTORE=m

CONFIG_PSTORE=y

CONFIG_PSTORE_CONSOLE=y

# CONFIG_PSTORE_PMSG is not set

# CONFIG_PSTORE_FTRACE is not set

CONFIG_PSTORE_RAM=m

I have also tried loading the ramoops module, but when I do

# cat /sys/module/pstore/parameters/backend

(null)

it doesn't seem to have enabled anything. /sys/fs/pstore is empty as well, altough mount says that it is mounted. I have tried to panic my kernel using this but nothing showed up.

What am I doing wrong? Is it even supposed to work on a normal laptop, or am I completely in the dark? I could not find very much while looking for this feature.

kernel-modules debugging

asked Mar 31 '16 at 9:29

D.S

40137

asked Mar 31 '16 at 9:29

D.S

40137

asked Mar 31 '16 at 9:29

D.S

40137

asked Mar 31 '16 at 9:29

D.S

40137

asked Mar 31 '16 at 9:29

D.S

40137

bumped to the homepage by Community♦ 2 days ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

bumped to the homepage by Community♦ 2 days ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

add a comment |

1 Answer
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You need to determine a piece of memory that survives a reboot. Then it's probably the easiest approach to pass that via kernel parameters, see
the ramoops Documentation in the kernel tree.

answered Aug 8 at 19:11

Uwe Kleine-König

101

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1 Answer
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1 Answer
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active

oldest

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up vote
0
down vote

You need to determine a piece of memory that survives a reboot. Then it's probably the easiest approach to pass that via kernel parameters, see
the ramoops Documentation in the kernel tree.

answered Aug 8 at 19:11

Uwe Kleine-König

101

add a comment |

up vote
0
down vote

You need to determine a piece of memory that survives a reboot. Then it's probably the easiest approach to pass that via kernel parameters, see
the ramoops Documentation in the kernel tree.

answered Aug 8 at 19:11

Uwe Kleine-König

101

add a comment |

up vote
0
down vote

You need to determine a piece of memory that survives a reboot. Then it's probably the easiest approach to pass that via kernel parameters, see
the ramoops Documentation in the kernel tree.

answered Aug 8 at 19:11

Uwe Kleine-König

101

You need to determine a piece of memory that survives a reboot. Then it's probably the easiest approach to pass that via kernel parameters, see
the ramoops Documentation in the kernel tree.

answered Aug 8 at 19:11

Uwe Kleine-König

101

answered Aug 8 at 19:11

Uwe Kleine-König

101

answered Aug 8 at 19:11

Uwe Kleine-König

101

answered Aug 8 at 19:11

Uwe Kleine-König

101

add a comment |

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