FWIW, I've been using this over-engineered, under-tested command line
utility to run e2fsck on our older distributions:
http://web.irridia.com/info/linux/unflimit.c
It works like "nice" or "time", but sets the proper RLIM_INFINITY
filesize limit for the inheriting subshell. For example:
unflimit e2fsck /dev/sda3
The boot-time fscks work fine, but in multiuser I'm extremely lucky to
get it to work without this.
The kernel patch below would work, I expect, but I think it's not
necessarily the Right Thing To Do. If Andrew is right, is anyone
looking at why block devices (or fsck?) are honoring the filesize limit?
Thanks,
-- Ken. brownfld@irridia.comOn Wed, Dec 05, 2001 at 10:33:19PM +0000, Miquel van Smoorenburg wrote: | In article <3C0E813D.F5B1F84E@zip.com.au>, | Andrew Morton <akpm@zip.com.au> wrote: | >Derek Glidden wrote: | >> | >> I've been experiencing random and occasional encounters with "File size | >> limit exceeded" errors under 2.4 kernels when trying to make | >> filesystems. | > | >I don't know if anyone has come forth to fix this yet. | > | >Apparently it's something to do with your shell setting | >rlimits, and block devices are (bogusly) honouring those | >settings. | | Perhaps the old app is calling sys_old_getrlimit() from | linux/kernel/sys.c. It truncates rlimits to 0x7FFFFFFF | if it's bigger than that. 0x7FFFFFFF used to be the old | RLIM_INFINITY in 2.2 [actually, ((long)(~0UL>>1))]. In | 2.4, RLIM_INFINITY is (~0UL). | | So if you call sys_setrlimit() with the old RLIM_INFINITY from 2.2 | OR with the result from sys_old_getrlimit(), then the new limit | will be 0x7FFFFFFF instead of unlimited. | | Looks like someone forgot to implement sys_old_setrlimit(), | which would have been the right thing to do. | | Now all we can do is to hack sys_setrlimit and let it translate | 0x7FFFFFFF to RLIM_INFINITY. | | The following untested and uncompiled patch might do it, or not... | | --- linux-2.4.17-pre2/kernel/sys.c.orig Tue Sep 18 23:10:43 2001 | +++ linux-2.4.17-pre2/kernel/sys.c Wed Dec 5 23:30:50 2001 | @@ -1120,6 +1120,16 @@ | return -EINVAL; | if(copy_from_user(&new_rlim, rlim, sizeof(*rlim))) | return -EFAULT; | +#if !defined(__ia64__) | + /* | + * In 2.2, RLIMIT_INFINITY was defined as ((long)(~0UL>>1)). | + * Reckognize it and translate it to the new RLIMIT_INFINITY. | + */ | + if ((long)new_rlim.rlim_cur == ((long)(~0UL>>1))) | + new_rlim.rlim_cur = RLIMIT_INFINITY; | + if ((long)new_rlim.rlim_max == ((long)(~0UL>>1))) | + new_rlim.rlim_max = RLIMIT_INFINITY; | +#endif | old_rlim = current->rlim + resource; | if (((new_rlim.rlim_cur > old_rlim->rlim_max) || | (new_rlim.rlim_max > old_rlim->rlim_max)) && | | Mike. | -- | "Only two things are infinite, the universe and human stupidity, | and I'm not sure about the former" -- Albert Einstein. | | - | To unsubscribe from this list: send the line "unsubscribe linux-kernel" in | the body of a message to majordomo@vger.kernel.org | More majordomo info at http://vger.kernel.org/majordomo-info.html | Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 21:00:29 EST