On Mon, Oct 27, 2014 at 06:51:43PM +0000, Daniel Thompson wrote:
Since commit cd678fce4280 ("switch logger to ->write_iter()"), any attempt to write to the log results in the log data being written over its own metadata, thus rendering the log unreadable.
The problem was first detected when I ran an Android userspace on the v3.18-rc1 kernel. However the issue can also be observed with a non-Android userspace by using echo/cat to write to/from /dev/log_main .
This patch resolves the problem by using a temporary to track the status of not-yet-committed writes to the log buffer.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Al Viro viro@zeniv.linux.org.uk
Applied