Date: Sun, 22 Jun 2014 16:56:39 +0200 From: "O. Hartmann" <ohartman@zedat.fu-berlin.de> To: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: [CURRENT]: weird memory/linker problem? Message-ID: <20140622165639.17a1ba1e.ohartman@zedat.fu-berlin.de>
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--Sig_/GA0b1J_OJrpRr.Akw/cGdwL Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hello. I face a strange problem on a set of CURRENT driven boxes. The systems in q= uestion are all the same version of CURRENT (more or less, a week or so discrepancy). The boxes affected have 8 GB of RAM and are old-style Core2Duo systems. The phenomenon: Starting up the box shows the operating system working. But sometimes it is= impossible to start certain applications, like Firefox - they segfault. More disturbing i= s the fail of the linker when building world. Sometimes I get strange messages like relocation truncated to fit: R_X86_64_PC32 against symbol `__error' defined= in .text when compiling/linking. The funny thing is: rebooting the box and doing exa= ctly the same very often leaves the system then operable - starting applications works, c= ompiling works! First I thought this could be a indication of a dying system and so I check= ed the memory for two days non-stop without any indication of anything wrong. The boxes d= o not have ECC RAM - it's Intel. I see this problem on two C2D based boxes relatively often (one E8400 two c= ore, another Q6600 quadcore, both systems have 8 GB RAM). This phenomenon also occured t= wo or three months ago on another machine with 32 GB RAM and a Core-i7 3930K, but it we= nt away (it was the very same error as shown above). Another system, a i3-3220 with 16 GB RAM never showed the problem although = that system build world also on a regular basis very frequent as the C2D systems do. Well, I feel a bit confused. On the first view, the problem looks weird and= it indicates a kind of memory problem - but testing the memory didn't show anything wron= g.=20 Today "windowmaker" stopped starting due to a malformed command in one of w= indowmaker's library. I did reboot the box and everything was all right. Then, also toda= y, I tried compiling world and I got a weird error message about a misspelled "Int__xx= x", I can not remember exactly the text, I rebooted and everything was all right again. Those errors are frequent on 8GB, C2D based systems and at the moment not p= resent any more on more modern systems with more memory as described above. This could= be a coincidence, but it is strange anyway. I do not exclude dying hardware, but I'd like to ask whether there is somet= hing strange going on with FreeBSD's memory management at the moment and whether those p= roblems could also be triggered by some nasty bug? I never see a crash (which would also = indicated faulty hardware), I mostly realise those strange behaviour either after a f= resh boot or after I ran some memory disk i/o intensive jobs, like updating the ports tr= ee. By the way, FreeBSD CURRENT suffer from a tremendous performance cut these = days when compiling world and updating the ports tree and running portmaster. On one = box, on which ports reside on a UFS partion, it takes more than 8 minutes to pass the por= tmaster -da, which is quick when not compiling world. On another system on which /usr/po= rts is residing on ZFS (the box has 16GB RAM!), it takes sometimes 30(!) minutes t= o perform a "svn update" while compiling world (that is the i3-3220 with 16 GB RAM syst= em), it takes 6 - 15 minutes when the box is relaxed and updating the ports tree the firs= t time (every subsequent update is much faster). Well, I know these reports of mine are a bit weird since I have no exact lo= g of the problems, but I think if there is an issue not with the hardware, I report = those in. Regards, oh --Sig_/GA0b1J_OJrpRr.Akw/cGdwL Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBAgAGBQJTpu6rAAoJEOgBcD7A/5N8BMcH/j/n0jLzpzyTtDf3GPjl9dfc +KmoeXTg3WsV6V7yyasAXL3uUtkCVTzG5thB2W/iOUQVE/1CSYNPkWgQ9VcnirGJ TV3p1+L4SYC2JBihkvc7DzaEhV7WqXnmiN+YMh0y7snTimEguQe2oOoRhj89HgtJ ysUvlAN/3upQVK2r7lIGmiJYqErEkx3avz3kdxHPP24oFwWsDT5hUOro8uPBw0i8 4MhlBY6FT8w5vHlYn/Sj95tLWe2mqVlB6Oa3kGLGtzGFUBN2zaDKo3cVco++1Mn1 dbfk3eV2IUKznZ8lR77D5vSbztGdhbriAmD/bajuxVnOu+O8ym6snBwSZXhsfQQ= =Nucn -----END PGP SIGNATURE----- --Sig_/GA0b1J_OJrpRr.Akw/cGdwL--
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