On 10/26/15 2:56 PM, Martin Jansa wrote: > On Mon, Oct 26, 2015 at 02:18:12PM -0500, Mark Hatle wrote: >> On 10/26/15 1:15 PM, Martin Jansa wrote: >>> On Mon, Oct 26, 2015 at 10:30:54AM -0500, Mark Hatle wrote: >>>> Due to problems with the prelinker itself, we need to disable the >>>> image-prelink by default. This will hopefully be re-enabled in the near >>>> future. >>> >>> Acked-by: Martin Jansa <martin.ja...@gmail.com> >>> >>> We had to disable it in our builds back in Dylan days. >> >> FYI this is working just fine in Dizzy. I've heard reports it works in Fido. >> This is the first that I know it's universally broken. (It's possible there >> were some issues in Fido, as I have not verified it either way.. but Dizzy >> definitely works and passes expected testings.) > > The main reason why we disabled it back then was that it was causing > debug symbols in -dbg packages not matching the prelinked binary in the > image > > The size of dynamic relocation section(rel.dyn) was changed from 0027a0 > to 003b70 by prelinking. Hence, the code section offset was also changed > from 015550 to 016920. > So, we can not use the dwarf file (.debug/libc-2.14.1.so) made before > prelinking. > > The number of relocations was 1296 when i use prelinked libraries. > This value was same on non-prelink. But the number of relative > relocations has decreased from 2296 to 328. > > Then we did some benchmarks on our target and they didn't show any > significant difference with and without prelink, for 4 stages of our > boot we got: > > 7.06 -> 7.08, 0.28% > 5.63 -> 5.75, 2.09% > 10.47 -> 10.53, 0.53% > 26.11 -> 26.15, 0.15% > > So we have disabled it and never looked back.
If I get things working again, I'll look into that. I suspect that was fixed shortly after, I remebmer there being some debug/dwarf patches going in around that time frame. --Mark > Regards, > >>>> Signed-off-by: Mark Hatle <mark.ha...@windriver.com> >>>> --- >>>> meta/conf/local.conf.sample | 4 +++- >>>> 1 file changed, 3 insertions(+), 1 deletion(-) >>>> >>>> diff --git a/meta/conf/local.conf.sample b/meta/conf/local.conf.sample >>>> index 3ae24ab..9d1480e 100644 >>>> --- a/meta/conf/local.conf.sample >>>> +++ b/meta/conf/local.conf.sample >>>> @@ -128,7 +128,9 @@ EXTRA_IMAGE_FEATURES = "debug-tweaks" >>>> # - 'image-swab' to perform host system intrusion detection >>>> # NOTE: if listing mklibs & prelink both, then make sure mklibs is before >>>> prelink >>>> # NOTE: mklibs also needs to be explicitly enabled for a given image, see >>>> local.conf.extended >>>> -USER_CLASSES ?= "buildstats image-mklibs image-prelink" >>>> +# NOTE: image-prelink is currently broken due to problems with the >>>> prelinker. It is advised >>>> +# that you do NOT run the prelinker at this time. >>>> +USER_CLASSES ?= "buildstats image-mklibs" >>>> >>>> >>>> # >>>> -- >>>> 1.9.3 >>>> >>>> -- >>>> _______________________________________________ >>>> Openembedded-core mailing list >>>> Openembedded-core@lists.openembedded.org >>>> http://lists.openembedded.org/mailman/listinfo/openembedded-core >>> >> > -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
