[lkml]   [2001]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
SubjectRe: Random "File size limit exceeded" under 2.4
In article <>,
Andrew Morton <> 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

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

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;
old_rlim = current->rlim + resource;
if (((new_rlim.rlim_cur > old_rlim->rlim_max) ||
(new_rlim.rlim_max > old_rlim->rlim_max)) &&
"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
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:13    [W:0.051 / U:3.832 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site