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authorAnton Vorontsov <anton.vorontsov@linaro.org>2012-07-09 17:10:41 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-07-17 10:05:52 -0700
commit060287b8c467bf49a594d8d669e1986c6d8d76b0 (patch)
treef869d1cc6d09875a0dc4f42b230f144617fc3bfc /kernel/trace
parent897dba027445be93f40e5caf550556ca38c48c51 (diff)
downloadlinux-060287b8c467bf49a594d8d669e1986c6d8d76b0.tar.bz2
pstore: Add persistent function tracing
With this support kernel can save function call chain log into a persistent ram buffer that can be decoded and dumped after reboot through pstore filesystem. It can be used to determine what function was last called before a reset or panic. We store the log in a binary format and then decode it at read time. p.s. Mostly the code comes from trace_persistent.c driver found in the Android git tree, written by Colin Cross <ccross@android.com> (according to sign-off history). I reworked the driver a little bit, and ported it to pstore. Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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