path: root/kernel
diff options
authorMichael Holzheu <>2012-01-12 17:20:23 -0800
committerLinus Torvalds <>2012-01-12 20:13:11 -0800
commitf5138e42211d4e8bfbd6ac5b3816348da1533433 (patch)
treec9d246be208547ded5dece81c57353f54d61ffd3 /kernel
parent1f536b9e9f85456df93614b3c2f6a1a2b7d7cb9b (diff)
kdump: add udev events for memory online/offline
Currently no udev events for memory hotplug "online" and "offline" are generated: # udevadm monitor # echo offline > /sys/devices/system/memory/memory4/state ==> No event When kdump is loaded, kexec detects the current memory configuration and stores it in the pre-allocated ELF core header. Therefore, for kdump it is necessary to reload the kdump kernel with kexec when the memory configuration changes (e.g. for online/offline hotplug memory). In order to do this automatically, udev rules should be used. This kernel patch adds udev events for "online" and "offline". Together with this kernel patch, the following udev rules for online/offline have to be added to "/etc/udev/rules.d/98-kexec.rules": SUBSYSTEM=="memory", ACTION=="online", PROGRAM="/etc/init.d/kdump restart" SUBSYSTEM=="memory", ACTION=="offline", PROGRAM="/etc/init.d/kdump restart" [ fixups for class to subsystem conversion] Signed-off-by: Michael Holzheu <> Cc: Heiko Carstens <> Cc: Vivek Goyal <> Cc: "Eric W. Biederman" <> Cc: Kay Sievers <> Cc: Dave Hansen <> Cc: Martin Schwidefsky <> Cc: Greg KH <> Signed-off-by: Stephen Rothwell <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions