Re: [PATCH 1/1] base.bbclass: add lock file for do_unpack task

[Darren Hart <dvhart@linux.intel.com>]

On 01/04/2011 03:36 AM, Yu Ke wrote:
> This patch intend to fix the random unpack failure of linux-libc-headers-yocto
> and linux-yocto.
>
> The root cause of the unpack failure is that: these two recpies has the same URL, thus
> has the same dest file during the fetch and unpack phase:
> do_fetch  : create tar ball ${DL_DIR}/git_git.pokylinux.org.linux-yocto-2.6.37.tar.gz
> do_unpack : extract tar ball ${DL_DIR}/git_git.pokylinux.org.linux-yocto-2.6.37.tar.gz
> fetch phase is protected by lockfile, so it works fine. but unpack phase is not lock protected,
> thus there is race condition like: when linux-yocto do_unpack is extracting the tar ball,
> linux-libc-headers-yocto do_fetch starts to create tar ball thus overwrite linux-yocto's
> tar ball and cause linux-yocto do_unpack failure
>
> To fix this issue, do_unpack also need to be protected by lock

Nice work! My out-for-review trace-cmd and kernelshark recipes will 
suffer the same issue.

-- 
Darren Hart
Yocto Linux Kernel