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/proc/XXX/smaps does not exist
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I am trying to debug what is going on on an ubuntu server. I tried to use my good old friend smem but it does not display anything, even if run as root. strace shows the culprit:
open("/proc/32376/smaps", O_RDONLY) = -1 ENOENT (No such file or directory)
I started to scream and kick. Hopefully, the server is not located in my office or it would have suffered some serious damage.
Maybe someone knows why the smaps files do not exist on this box ? (I am running a 2.6.38 kernel on a 64bit box so, it should be here, really)
Mathieu
ubuntu memory
asked Feb 13 '13 at 15:59
mathieumathieu
16318
bumped to the homepage by Community♦ 10 mins 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 |
I am trying to debug what is going on on an ubuntu server. I tried to use my good old friend smem but it does not display anything, even if run as root. strace shows the culprit:
open("/proc/32376/smaps", O_RDONLY) = -1 ENOENT (No such file or directory)
I started to scream and kick. Hopefully, the server is not located in my office or it would have suffered some serious damage.
Maybe someone knows why the smaps files do not exist on this box ? (I am running a 2.6.38 kernel on a 64bit box so, it should be here, really)
Mathieu
ubuntu memory
asked Feb 13 '13 at 15:59
mathieumathieu
16318
bumped to the homepage by Community♦ 10 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Obvious check: is the process ID correct?
– Hennes
Feb 13 '13 at 16:19
Yes, could it be that PID 32376 is gone in the meantime?
– ott--
Feb 13 '13 at 16:25
yes, the pid is correct: this was one of the very many errors I got with strace and I checked that cat /proc/self/smaps fails too.
– mathieu
Feb 13 '13 at 16:33
Please identify the specific distribution of Ubuntu. No issue but I am using a 3.2.0 kernel. Are you sure it is present in the 2.6.x kernels?
– mdpc
Feb 13 '13 at 17:42
You might try moving this question to the Ubuntu group.
– mdpc
Feb 13 '13 at 17:43
add a comment |
I am trying to debug what is going on on an ubuntu server. I tried to use my good old friend smem but it does not display anything, even if run as root. strace shows the culprit:
open("/proc/32376/smaps", O_RDONLY) = -1 ENOENT (No such file or directory)
I started to scream and kick. Hopefully, the server is not located in my office or it would have suffered some serious damage.
Maybe someone knows why the smaps files do not exist on this box ? (I am running a 2.6.38 kernel on a 64bit box so, it should be here, really)
Mathieu
ubuntu memory
asked Feb 13 '13 at 15:59
mathieumathieu
16318
I am trying to debug what is going on on an ubuntu server. I tried to use my good old friend smem but it does not display anything, even if run as root. strace shows the culprit:
open("/proc/32376/smaps", O_RDONLY) = -1 ENOENT (No such file or directory)
I started to scream and kick. Hopefully, the server is not located in my office or it would have suffered some serious damage.
Maybe someone knows why the smaps files do not exist on this box ? (I am running a 2.6.38 kernel on a 64bit box so, it should be here, really)
Mathieu
ubuntu memory
ubuntu memory
asked Feb 13 '13 at 15:59
mathieumathieu
16318
asked Feb 13 '13 at 15:59
mathieumathieu
16318
asked Feb 13 '13 at 15:59
mathieumathieu
16318
asked Feb 13 '13 at 15:59
mathieumathieu
16318
asked Feb 13 '13 at 15:59
mathieumathieu
16318
16318
bumped to the homepage by Community♦ 10 mins 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♦ 10 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Obvious check: is the process ID correct?
– Hennes
Feb 13 '13 at 16:19
Yes, could it be that PID 32376 is gone in the meantime?
– ott--
Feb 13 '13 at 16:25
yes, the pid is correct: this was one of the very many errors I got with strace and I checked that cat /proc/self/smaps fails too.
– mathieu
Feb 13 '13 at 16:33
Please identify the specific distribution of Ubuntu. No issue but I am using a 3.2.0 kernel. Are you sure it is present in the 2.6.x kernels?
– mdpc
Feb 13 '13 at 17:42
You might try moving this question to the Ubuntu group.
– mdpc
Feb 13 '13 at 17:43
add a comment |
Obvious check: is the process ID correct?
– Hennes
Feb 13 '13 at 16:19
Yes, could it be that PID 32376 is gone in the meantime?
– ott--
Feb 13 '13 at 16:25
yes, the pid is correct: this was one of the very many errors I got with strace and I checked that cat /proc/self/smaps fails too.
– mathieu
Feb 13 '13 at 16:33
Please identify the specific distribution of Ubuntu. No issue but I am using a 3.2.0 kernel. Are you sure it is present in the 2.6.x kernels?
– mdpc
Feb 13 '13 at 17:42
You might try moving this question to the Ubuntu group.
– mdpc
Feb 13 '13 at 17:43
Obvious check: is the process ID correct?
– Hennes
Feb 13 '13 at 16:19
Obvious check: is the process ID correct?
– Hennes
Feb 13 '13 at 16:19
Yes, could it be that PID 32376 is gone in the meantime?
– ott--
Feb 13 '13 at 16:25
Yes, could it be that PID 32376 is gone in the meantime?
– ott--
Feb 13 '13 at 16:25
yes, the pid is correct: this was one of the very many errors I got with strace and I checked that cat /proc/self/smaps fails too.
– mathieu
Feb 13 '13 at 16:33
yes, the pid is correct: this was one of the very many errors I got with strace and I checked that cat /proc/self/smaps fails too.
– mathieu
Feb 13 '13 at 16:33
Please identify the specific distribution of Ubuntu. No issue but I am using a 3.2.0 kernel. Are you sure it is present in the 2.6.x kernels?
– mdpc
Feb 13 '13 at 17:42
Please identify the specific distribution of Ubuntu. No issue but I am using a 3.2.0 kernel. Are you sure it is present in the 2.6.x kernels?
– mdpc
Feb 13 '13 at 17:42
You might try moving this question to the Ubuntu group.
– mdpc
Feb 13 '13 at 17:43
You might try moving this question to the Ubuntu group.
– mdpc
Feb 13 '13 at 17:43
add a comment |
2 Answers
2
active
oldest
votes
From the proc(5) manpage:
This file is only present if the CONFIG_MMU kernel configuration option is enabled.
Check the kernel configuration to see if this option is enabled (look for a config- file in /boot/ or for /proc/config.gz):
% grep CONFIG_MMU /boot/config-$(uname -r)
CONFIG_MMU=y
CONFIG_MMU_NOTIFIER=y
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
I haveCONFIG_MMU=y(zgrep CONFIG_MMU /proc/config.gz) but still getting the same error -find /proc -name smapsfinds nothing, andsmemshows no output. Additional ideas?
– grebneke
Feb 5 '14 at 15:46
1
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables/proc/<pid>/smapsfor security reasons.
– grebneke
Feb 5 '14 at 18:49
add a comment |
Should enable kernel config:
CONFIG_PROC_PAGE_MONITOR
answered Jun 6 '18 at 8:46
user1979289user1979289
1
add a comment |
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2 Answers
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2 Answers
2
active
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active
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active
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From the proc(5) manpage:
This file is only present if the CONFIG_MMU kernel configuration option is enabled.
Check the kernel configuration to see if this option is enabled (look for a config- file in /boot/ or for /proc/config.gz):
% grep CONFIG_MMU /boot/config-$(uname -r)
CONFIG_MMU=y
CONFIG_MMU_NOTIFIER=y
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
I haveCONFIG_MMU=y(zgrep CONFIG_MMU /proc/config.gz) but still getting the same error -find /proc -name smapsfinds nothing, andsmemshows no output. Additional ideas?
– grebneke
Feb 5 '14 at 15:46
1
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables/proc/<pid>/smapsfor security reasons.
– grebneke
Feb 5 '14 at 18:49
add a comment |
From the proc(5) manpage:
This file is only present if the CONFIG_MMU kernel configuration option is enabled.
Check the kernel configuration to see if this option is enabled (look for a config- file in /boot/ or for /proc/config.gz):
% grep CONFIG_MMU /boot/config-$(uname -r)
CONFIG_MMU=y
CONFIG_MMU_NOTIFIER=y
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
I haveCONFIG_MMU=y(zgrep CONFIG_MMU /proc/config.gz) but still getting the same error -find /proc -name smapsfinds nothing, andsmemshows no output. Additional ideas?
– grebneke
Feb 5 '14 at 15:46
1
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables/proc/<pid>/smapsfor security reasons.
– grebneke
Feb 5 '14 at 18:49
add a comment |
From the proc(5) manpage:
This file is only present if the CONFIG_MMU kernel configuration option is enabled.
Check the kernel configuration to see if this option is enabled (look for a config- file in /boot/ or for /proc/config.gz):
% grep CONFIG_MMU /boot/config-$(uname -r)
CONFIG_MMU=y
CONFIG_MMU_NOTIFIER=y
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
From the proc(5) manpage:
This file is only present if the CONFIG_MMU kernel configuration option is enabled.
Check the kernel configuration to see if this option is enabled (look for a config- file in /boot/ or for /proc/config.gz):
% grep CONFIG_MMU /boot/config-$(uname -r)
CONFIG_MMU=y
CONFIG_MMU_NOTIFIER=y
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
answered Feb 13 '13 at 19:21
mgorvenmgorven
26.4k755108
26.4k755108
I haveCONFIG_MMU=y(zgrep CONFIG_MMU /proc/config.gz) but still getting the same error -find /proc -name smapsfinds nothing, andsmemshows no output. Additional ideas?
– grebneke
Feb 5 '14 at 15:46
1
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables/proc/<pid>/smapsfor security reasons.
– grebneke
Feb 5 '14 at 18:49
add a comment |
I haveCONFIG_MMU=y(zgrep CONFIG_MMU /proc/config.gz) but still getting the same error -find /proc -name smapsfinds nothing, andsmemshows no output. Additional ideas?
– grebneke
Feb 5 '14 at 15:46
1
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables/proc/<pid>/smapsfor security reasons.
– grebneke
Feb 5 '14 at 18:49
I have
CONFIG_MMU=y (zgrep CONFIG_MMU /proc/config.gz) but still getting the same error - find /proc -name smaps finds nothing, and smem shows no output. Additional ideas?– grebneke
Feb 5 '14 at 15:46
I have
CONFIG_MMU=y (zgrep CONFIG_MMU /proc/config.gz) but still getting the same error - find /proc -name smaps finds nothing, and smem shows no output. Additional ideas?– grebneke
Feb 5 '14 at 15:46
1
1
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables
/proc/<pid>/smaps for security reasons.– grebneke
Feb 5 '14 at 18:49
Answering my own question for future readers: My kernel uses grsecurity patches. Grsecurity disables
/proc/<pid>/smaps for security reasons.– grebneke
Feb 5 '14 at 18:49
add a comment |
Should enable kernel config:
CONFIG_PROC_PAGE_MONITOR
answered Jun 6 '18 at 8:46
user1979289user1979289
1
add a comment |
Should enable kernel config:
CONFIG_PROC_PAGE_MONITOR
answered Jun 6 '18 at 8:46
user1979289user1979289
1
add a comment |
Should enable kernel config:
CONFIG_PROC_PAGE_MONITOR
answered Jun 6 '18 at 8:46
user1979289user1979289
1
Should enable kernel config:
CONFIG_PROC_PAGE_MONITOR
answered Jun 6 '18 at 8:46
user1979289user1979289
1
answered Jun 6 '18 at 8:46
user1979289user1979289
1
answered Jun 6 '18 at 8:46
user1979289user1979289
1
answered Jun 6 '18 at 8:46
user1979289user1979289
1
1
add a comment |
add a comment |
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Obvious check: is the process ID correct?
– Hennes
Feb 13 '13 at 16:19
Yes, could it be that PID 32376 is gone in the meantime?
– ott--
Feb 13 '13 at 16:25
yes, the pid is correct: this was one of the very many errors I got with strace and I checked that cat /proc/self/smaps fails too.
– mathieu
Feb 13 '13 at 16:33
Please identify the specific distribution of Ubuntu. No issue but I am using a 3.2.0 kernel. Are you sure it is present in the 2.6.x kernels?
– mdpc
Feb 13 '13 at 17:42
You might try moving this question to the Ubuntu group.
– mdpc
Feb 13 '13 at 17:43