From: Kevin Wolf Date: Thu, 16 Aug 2012 08:56:35 +0000 (+0200) Subject: Documentation: Warn against qemu-img on active image X-Git-Tag: v1.1.2~43 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f946f010f5f7d6b13bf6acabffebe093b1c9949c;p=thirdparty%2Fqemu.git Documentation: Warn against qemu-img on active image People have repeatedly expected that you can do things like snapshotting an image with qemu-img while a qemu instance is running. Maybe we need to consider locking the files while they are in use, but having a warning in the qemu-img manpage is doable for 1.2 and can't hurt anyway. Signed-off-by: Kevin Wolf (cherry picked from commit 48467328c6dccc9c7be6628ed0ef0810f83be2a9) Signed-off-by: Michael Roth --- diff --git a/qemu-img.texi b/qemu-img.texi index 9cee2eaa6e0..482c21b3957 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -4,6 +4,16 @@ usage: qemu-img command [command options] @c man end @end example +@c man begin DESCRIPTION +qemu-img allows you to create, convert and modify images offline. It can handle +all image formats supported by QEMU. + +@b{Warning:} Never use qemu-img to modify images in use by a running virtual +machine or any other process; this may destroy the image. Also, be aware that +querying an image that is being modified by another process may encounter +inconsistent state. +@c man end + @c man begin OPTIONS The following commands are supported: