Re: [gentoo-portage-dev] [PATCH] vardbapi.aux_get: treat cache as valid if mtime is truncated (bug 564222)

["Rick \"Zero_Chaos\" Farina" <zerochaos@gentoo.org>]

This speeds up initial emerge run on my livecd by eight minutes.  Please
accept.

Thanks,
Zero

On 10/27/2015 09:52 PM, Zac Medico wrote:
> X-Gentoo-Bug: 564222
> X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=564222
> ---
>  pym/portage/dbapi/vartree.py | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/pym/portage/dbapi/vartree.py b/pym/portage/dbapi/vartree.py
> index 5ba8d9d..bac9837 100644
> --- a/pym/portage/dbapi/vartree.py
> +++ b/pym/portage/dbapi/vartree.py
> @@ -728,7 +728,11 @@ class vardbapi(dbapi):
>  		if pkg_data:
>  			cache_mtime, metadata = pkg_data
>  			if isinstance(cache_mtime, float):
> -				cache_valid = cache_mtime == mydir_stat.st_mtime
> +				# Handle truncated mtime in order to avoid cache
> +				# invalidation for livecd squashfs (bug 564222).
> +				cache_valid = cache_mtime == mydir_stat.st_mtime or (
> +					mydir_stat.st_mtime == mydir_stat[stat.ST_MTIME]
> +					and long(cache_mtime) == mydir_stat[stat.ST_MTIME])
>  			else:
>  				# Cache may contain integer mtime.
>  				cache_valid = cache_mtime == mydir_stat[stat.ST_MTIME]
>