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| author | Miroslav Benes <mbenes@suse.cz> | 2019-01-15 17:45:07 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2019-01-16 22:09:33 +0100 |
| commit | 0b3d52790e1cfd6b80b826a245d24859e89632f7 (patch) | |
| tree | 8a804f975eeacddea0add44d9b2ad912a9fbc636 /Documentation/livepatch | |
| parent | cba82dea30613346cf9a0532a41fc118bc3263af (diff) | |
| download | linux-0-day-0b3d52790e1cfd6b80b826a245d24859e89632f7.tar.gz linux-0-day-0b3d52790e1cfd6b80b826a245d24859e89632f7.tar.xz | |
livepatch: Remove signal sysfs attribute
The fake signal is send automatically now. We can rely on it completely
and remove the sysfs attribute.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'Documentation/livepatch')
| -rw-r--r-- | Documentation/livepatch/livepatch.txt | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/Documentation/livepatch/livepatch.txt b/Documentation/livepatch/livepatch.txt index 407e0f03dc99d..4627b41ff02ef 100644 --- a/Documentation/livepatch/livepatch.txt +++ b/Documentation/livepatch/livepatch.txt @@ -158,13 +158,11 @@ If a patch is in transition, this file shows 0 to indicate the task is unpatched and 1 to indicate it's patched. Otherwise, if no patch is in transition, it shows -1. Any tasks which are blocking the transition can be signaled with SIGSTOP and SIGCONT to force them to change their -patched state. This may be harmful to the system though. -/sys/kernel/livepatch/<patch>/signal attribute provides a better alternative. -Writing 1 to the attribute sends a fake signal to all remaining blocking -tasks. No proper signal is actually delivered (there is no data in signal -pending structures). Tasks are interrupted or woken up, and forced to change -their patched state. Despite the sysfs attribute the fake signal is also sent -every 15 seconds automatically. +patched state. This may be harmful to the system though. Sending a fake signal +to all remaining blocking tasks is a better alternative. No proper signal is +actually delivered (there is no data in signal pending structures). Tasks are +interrupted or woken up, and forced to change their patched state. The fake +signal is automatically sent every 15 seconds. Administrator can also affect a transition through /sys/kernel/livepatch/<patch>/force attribute. Writing 1 there clears @@ -412,8 +410,8 @@ Information about the registered patches can be found under /sys/kernel/livepatch. The patches could be enabled and disabled by writing there. -/sys/kernel/livepatch/<patch>/signal and /sys/kernel/livepatch/<patch>/force -attributes allow administrator to affect a patching operation. +/sys/kernel/livepatch/<patch>/force attributes allow administrator to affect a +patching operation. See Documentation/ABI/testing/sysfs-kernel-livepatch for more details. |