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author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-09-22 19:49:27 -0400 |
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committer | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-09-22 19:49:27 -0400 |
commit | f056878332a91ed984a116bad4e7d49aefff9e6e (patch) | |
tree | 572f4757c8e7811d45e0be0c2ae529c78fb63441 /Documentation/sysrq.txt | |
parent | 3961f7c3cf247eee5df7fabadc7a40f2deeb98f3 (diff) | |
parent | 7fa07729e439a6184bd824746d06a49cca553f15 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
drivers/power/wm97xx_battery.c
Diffstat (limited to 'Documentation/sysrq.txt')
-rw-r--r-- | Documentation/sysrq.txt | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt index cf42b820ff9d..d56a01775423 100644 --- a/Documentation/sysrq.txt +++ b/Documentation/sysrq.txt | |||
@@ -66,7 +66,8 @@ On all - write a character to /proc/sysrq-trigger. e.g.: | |||
66 | 'b' - Will immediately reboot the system without syncing or unmounting | 66 | 'b' - Will immediately reboot the system without syncing or unmounting |
67 | your disks. | 67 | your disks. |
68 | 68 | ||
69 | 'c' - Will perform a kexec reboot in order to take a crashdump. | 69 | 'c' - Will perform a system crash by a NULL pointer dereference. |
70 | A crashdump will be taken if configured. | ||
70 | 71 | ||
71 | 'd' - Shows all locks that are held. | 72 | 'd' - Shows all locks that are held. |
72 | 73 | ||
@@ -141,8 +142,8 @@ useful when you want to exit a program that will not let you switch consoles. | |||
141 | re'B'oot is good when you're unable to shut down. But you should also 'S'ync | 142 | re'B'oot is good when you're unable to shut down. But you should also 'S'ync |
142 | and 'U'mount first. | 143 | and 'U'mount first. |
143 | 144 | ||
144 | 'C'rashdump can be used to manually trigger a crashdump when the system is hung. | 145 | 'C'rash can be used to manually trigger a crashdump when the system is hung. |
145 | The kernel needs to have been built with CONFIG_KEXEC enabled. | 146 | Note that this just triggers a crash if there is no dump mechanism available. |
146 | 147 | ||
147 | 'S'ync is great when your system is locked up, it allows you to sync your | 148 | 'S'ync is great when your system is locked up, it allows you to sync your |
148 | disks and will certainly lessen the chance of data loss and fscking. Note | 149 | disks and will certainly lessen the chance of data loss and fscking. Note |