Blaisorblade wrote: > Which is the cmd line? With how much memory where these instances started?
Kernel command line: mem=300M fake_ide fakehd con=null con0=fd:0,fd:1 devfs=nomount root=/dev/ubda ubda=<snip> 7 ubdb=<snip> eth0=tuntap,encode1_0,fe:fd:46:55:81:95 token_max=400000 token_refill=512 > Ok, Jeff, I recall something but I'm not sure. I even thought kernel threads > mapped the whole RAM at boot in their physical range part (which is their > entire address space), but it does not seem so. > > The host is just a 64G with 3G/1G split, however the UML is a TT+SKAS with > HALF_GIGS=2 (which _is_ unusual, and could be replaced with disabling TT Jeff had this discussion with me a few weeks ago when I was trying to get UML to use more than ~550M. At that time, I tried disabling TT mode but had to revert because non-TT mode enabled umls wouldn't boot on some very old skas hosts of mine. I suspected that you might point in the same direction he did. That problem is less important since I should really just upgrade those boxes... > entirely, which gives a free 2,75G of memory space for UML). In fact, the UML > binary starts at 0x8000 0000 (i.e. 2G), and there are various holes in the > virtual RAM mapped in kernel side - a big part of about 30M (the > 0x80607000-0x92c00000 range), then there is a 4M hole (the pre-vmalloc hole > should be 8M, but we have a 4M hole for uml_reserved after current brk()), > then various holes and allocated ranges (with varying offsets) here and > there, like if the area were allocated for vmalloc(). The problem is that we > have an allocated anonymous memory range (which the checksum is accessing) > before the 4M hole! > > 80000000-80514000 rwxp 00000000 fd:00 540678 /vbin/kernel/2.6.18-linode25 > 80514000-80607000 rwxp 80514000 00:00 0 [heap] > 80607000-92c00000 rwxs 00607000 00:16 > 738427 /linodes/encode1/tmp/vm_file-AVT0fb (deleted) > <hole here> > 93000000-9300b000 rwxs 006b6000 00:16 > 738427 /linodes/encode1/tmp/vm_file-AVT0fb (deleted) > 9300c000-93017000 rwxs 006c2000 00:16 > 738427 /linodes/encode1/tmp/vm_file-AVT0fb (deleted) > > I can't follow this code at the moment, so I go for now. > Bye! -Chris ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
