XRP Ninja

So, as some of you may know, I have just settled down in San Jose, CA. My new job is Site Reliability Engineer in Google Mountain View office. I would like make some new friends here. If you live nearby, let me know, ;)

getdents64 was added to N32 ABI during 2.6.35 merge window. But it has a problem which is later fixed by a patch merged in 2.6.36 window. IIRC, readdir in glibc works with both getdents and getdents64, and it prefers getdents64 if it is available. So if your glibc is compiled against linux-header-2.6.35 and upwards, readdir will use getdents64, but on Linux 2.6.35 it actually calls getdents. So readdir will be confused. As a consequence, you will have problems accessing files. The system will be effectively unusable. So if you have encountered this problem, pray that you have another system which could boot the machine. Compile a kernel 2.6.36 or upwards and use it to boot the system. Then you should be able to get your system back.

Almost forget to mention, now with this workaround http://bit.ly/d5rBqp , N32 firefox-3.6.8 is working again. I am still trying to fix the binutils bug. http://sourceware.org/bugzilla/show_bug.cgi?id=11956 I am feeling that I am not far from a break through. BTW, Shenzhen Linux User Group will celebrate Software Freedom Day 2010 on this Saturday. If you happen to be in town by then, do drop by, ;) http://bit.ly/sz_sfd_2010 If you can come, and don't understand Chinese, I am always ready for help. ;)

It is under experimental/mips/stages/loongson/. Like: http://mirrors.xmu.edu.cn/gentoo/experimental/mips/stages/loongson/ I should have done it long ago, just don't familiar with catalyst and catalyst lacks documentation. Thanks to leio and robbat2 for making it happen. http://bugs.gentoo.org/show_bug.cgi?id=330021 I have already included kernel modules in the stage3. You can find the corresponding kernel here: http://www.gentoo-cn.org/~zhangle/ If you want to build your own kernel, use the source here: http://dev.lemote.com/code/linux-loongson-community/wiki/WikiStart You also need loongson overlay. Just use layman to add it. Of course you need to emerge layman first. http://www.gentoo-cn.org/gitweb/?p=loongson.git;a=summary If you find portage ask you to downgrade packages, you can try this trick ACCEPT_KEYWORDS="x86 ~x86 ~mips" However you need to understand that there is no guarantee that software installed in this way would work. But at least some of them will work. ...

UPDATE: The build failed because of gcc's multislot USE flag(seed stage has it while catalyst can't set USE for stage3). I was on a trip so there is actually no progress for the last 5 days. Sorry. I have worked around it. Now rebuilding. First, sudo gainroot. Then run the following two commands: /home/user # gconftool-2 -s /apps/osso/xterm/key_labels -t list --list-type=string '[Tab,Esc,~,`,|,>, /home/user # gconftool-2 -s /apps/osso/xterm/keys -t list --list-type=string "[Tab,Escape,asciitilde,grave,bar,greater,less]" Then restart your xterm, you will see the bottom bar looks like the one showing in the following picture: This picture shows that I am building new stage3 for Loongson 2F, N32 ABI, ;)

Update 2010-07-09: the patch received upstream attention. The maintainer said it's better to send to rpm-devel@rpm5.org directly. Update: just reported to upstream http://rpm5.org/cvs/tktview?tn=61 I resumed my quest to xulrunner linking problem on Loongson: http://old.nabble.com/R_MIPS_TLS_GD-reloc-overflow-when-linking-%3E%3Dxulrunner-1.9.1.5-td26755056.html But I found that "installsources" FEATURE is not working on Loongson. I investigated it and found that it is because debug.sources file produced by debugedit is empty. Then I found that in turn was because debug related sections in MIPS elf file is not of type SHT_PROGBITS, but SHT_MIPS_DWARF. [32] .debug_aranges MIPS_DWARF 00000000 0845c4 0002c0 00 0 0 1 [33] .debug_pubnames MIPS_DWARF 00000000 084884 001a2a 00 0 0 1 [34] .debug_info MIPS_DWARF 00000000 0862ae 015221 00 0 0 1 [35] .debug_abbrev MIPS_DWARF 00000000 09b4cf 002c9a 00 0 0 1 [36] .debug...

Update: the kernel patch is already in 2.6.34-rcN. Currently, in top, the SWAP column only shows the difference between VIRT and RES: case P_SWP: MKCOL(scale_num(PAGES_TO_KB(p->size - p->resident), w, s)); So currently the value is of no use. As a matter of fact, a recent enough kernel has provided the information which is needed to calculate the swap usage for each process. It is in /proc/$PID/smaps. But using smaps may affect top's performance because you have to calculate the sum yourself. But with this patch https://patchwork.kernel.org/patch/56929/ , the kernel will keep track of each process's swap usage for you. This patch (maybe not exactly in the same shape) is already in mmotm tree ( http://userweb.kernel.org/~akpm/mmotm/ ) 2.6.34-rcN. However, checking the /proc/$PID/status file directly may not be a thing which people would like to do. So I decided to make a patch for ps and top. Now it seems to be working. This is the vanilla ps: $ ps -o m_swap,comm...