diff options
Diffstat (limited to 'sbin/dumpon')
| -rw-r--r-- | sbin/dumpon/dumpon.8 | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/sbin/dumpon/dumpon.8 b/sbin/dumpon/dumpon.8 index 72b4a3e..3e9e1bd 100644 --- a/sbin/dumpon/dumpon.8 +++ b/sbin/dumpon/dumpon.8 @@ -68,8 +68,16 @@ flag causes .Nm to be verbose about its activity. .Sh NOTES -One of the system swap devices is usually chosen as the dump device, as -swap devices are the most likely to have the required space at dump time. +Since a +.Xr panic 9 +condition may occur in a situation +where the kernel cannot trust its internal representation +of the state of any given filesystem, +one of the system swap devices, +and +.Em not +a device containing a filesystem, +should be used as the dump device. .Pp The .Nm @@ -96,8 +104,8 @@ is the text string: .Xr swapon 8 , .Xr panic 9 .Sh FILES -.Bl -tag -width "/dev/{wd,da}?s?b" -compact -.It Pa /dev/{wd,da}?s?b +.Bl -tag -width "/dev/{ad,da}?s?b" -compact +.It Pa /dev/{ad,da}?s?b standard swap areas .It Pa /etc/rc.conf boot-time system configuration @@ -106,9 +114,11 @@ boot-time system configuration Because the filesystem layer is already dead by the time a crash dump is taken, it is not possible to send crash dumps directly to a file. .Pp -.Nm Dumpon -currently allows only devices with minor number 1 to be used as dump -devices. +Since +.Nm +can only be called after the system enters single-user mode, +it can not be used to create dumps +for system panics during kernel initialization. .Sh HISTORY The .Nm |
