[Bug 71024] Re: ulimit / pam limits don't work
This bug still exists today. No way to limit RAM usage of apps, no mention of this in the limits.conf example file which still has examples for rss. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/71024 Title: ulimit / pam limits don't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pam/+bug/71024/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
What kind of fix is supposed to be released in which version? I'm running an up-to-date hardy and the limits (e.g. rss) don't work but the limits.conf man-page still doesn't mention this (and it even has rss as an example of something that supposedly should work). -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
This information is rather hard to come by. Since this is fixed, should I instead file bugs against - limits.conf - lists an rss limit as the example in the man page, and does not warn that some or the limits just don't work. - zsh (and presumably, bash), which similarly pretends that limits work, does not report an error when setting one that don't, and while I'm at it, really should support abbreviated numbers (K,M,G suffixes) instead of just ignoring the suffix. ? Anyway, I was using ulimit -d (RLIMIT_DATA), is that also supposed to not work? BTW, there's a patch for RLIMIT_RSS on 2.6.8 at http://lwn.net/Articles/96859/, presumably it wasn't applied? -k -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
The full thread is here: http://lkml.org/lkml/2004/8/5/227 It seems it was never finished. Perhaps there were additional discussions. I think limits.conf certainly needs a patch, though I'm unsure what to do about the shells ulimit commands. Regardless, it seems that the manpage should perhaps be strengthened to point out that in almost all situations, virtual memory is the thing you want to limit. The data limits (which I didn't test) aren't actually effective if they do work the way they're documented: glibc will use mmap for large heap allocations, so data limits are just brk() limits, which isn't too useful. -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
Oops. I should have read up a little more on the rlimits. The RSS limit is actually not valid for linux anymore: RLIMIT_RSS Specifies the limit (in pages) of the process’s resident set (the number of virtual pages resident in RAM). This limit only has effect in Linux 2.4.x, x 30, and there only affects calls to madvise(2) specifying MADV_WILLNEED. So, only -v is useful for limiting memory space. ** Changed in: pam (Ubuntu) Status: Confirmed = Fix Released -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
I can reproduce this for -m, but not -v under Feisty or Gutsy. The example code above segfaulted when I used it, so I wrote a slightly smaller version (attached). Here is what I see: $ ulimit -a | grep mem max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited virtual memory (kbytes, -v) unlimited $ ./toomuch 102500 allocating... using... done! $ ulimit -v 102400 $ ulimit -a | grep mem max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited virtual memory (kbytes, -v) 102400 $ ./toomuch 102500 allocating... malloc: Cannot allocate memory Setting -m to 5 and re-running toomuch as above, I could verify in top that it was reporting 100M of RSS usage. ** Attachment added: toomuch.c http://launchpadlibrarian.net/10220730/toomuch.c -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
** Changed in: pam (Ubuntu) Importance: Undecided = Medium -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
If it takes a decade (and still counting) to make lsof display the offset I don't think pam limits will get fixed any time soon. (Yes, yes, I know they are different issues, I'm just grumpy and bitter.) I constantly bump into these absurd inflexibilities in linux, which I nowadays consider to be only a toy kernel/OS precisely because of these shortcomings. -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
I see the same behavior on Gutsy beta (current revsion). Limit/ulimit shows limits for memory and data sizes, but my program quickly grows beyond that. As the current Linux kernel is utterly incapable of dealing with swap pressure - it takes several minutes to switch terminal and wait for ^C to go through - this is a critical issue. I'm stunned that this appears to have been a problem for years. My system is x86_64 on a Core Duo laptop. -k -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
** Changed in: pam (Ubuntu) Status: Incomplete = Triaged -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
** Changed in: pam (Ubuntu) Status: Triaged = Confirmed -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
Hi! Thanks for the test program. Sorry for the long delay on this. I should have a chance to really dig into this problem later this week. ** Changed in: pam (Ubuntu) Sourcepackagename: None = pam ** Changed in: pam (Ubuntu) Assignee: (unassigned) = Kees Cook -- ulimit / pam limits don't work https://bugs.launchpad.net/bugs/71024 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
The status has been Needs Info for quite a while now. What info is needed? Whether this worked in dapper? If you have a dapper system around then it's really easy to test it. I've attached an archive with both source and binary of a small program to allocate a specified amount of memory. ** Attachment added: Memory allocator program http://librarian.launchpad.net/6590899/alloc.tar.bz2 -- ulimit / pam limits don't work https://launchpad.net/bugs/71024 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
Thanks for the report! Did this work as you expected in Dapper? ** Visibility changed to: Public ** Changed in: Ubuntu Status: Unconfirmed = Needs Info -- ulimit / pam limits don't work https://launchpad.net/bugs/71024 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 71024] Re: ulimit / pam limits don't work
Unfortunately I don't know if it worked in dapper or not. I thought it did, but then again I thought it worked in edgy, too, before I started debugging some memory problems. Sorry. -- ulimit / pam limits don't work https://launchpad.net/bugs/71024 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
