[lkml]   [2003]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.6.0-test5/6 (and probably 7 too) size-4096 memory leak
William Lee Irwin III <> wrote:
> Alberto Bertogli <> wrote:
> >> Slabinfo reports that size-4096 has 104341 active objects and growing.
> >> On another box at home I see the same issue with test6, but "only" with
> >> 11612 objects; I'm not posting info on this box as I guess the mailserver
> >> is much more important because the leak is really noticeable.
> On Wed, Oct 15, 2003 at 09:19:18PM -0700, Andrew Morton wrote:
> > At least I'm not the only one; my main desktop machine does the same
> > thing. It leaks two megabytes a day into size-4096, like clockwork. It's
> > up to 43 megs now.
> > I was ignoring it and hoping it would go away. Ho hum. Tricky.
> I immediately thought of bundling this in with the do_exit() BUG() and
> /proc/ oopsen, but we would see a task_t leak also in that case. I still
> say the /proc/ change is swiss cheese (well, in concept there's nothing
> wrong with what it wants to do, but there's something definitely wrong
> with the implementation since backing it out stops things from oopsing),
> but this looks unrelated therefore (which is actually depressing, since
> we can't kill all three in one shot and/or get anywhere by correlating).
> I should try using a dedicated stack slab to see if they're stacks even
> though task_t's aren't leaking.

This leak is at least a couple of months old.

The recent (test7) /proc oops was fixed when Linus reverted the
job-control-in-signal-struct patch.

This leak is of size-4096: it isn't kernel stacks.

I did a quicky audit of all kmalloc(PAGE_SIZE) instances and everything
looked OK: one suspect in the NFS server but I wasn't able to force
speedier bloat by exercising the NFS server in my normal usage pattern.

I'm thinking we need to stuff builtin_return_address(0) into the object and
write a dumper, but I haven't looked into that. Maybe I can persuade
Manfred to cook up a custom patch to do that? Just for size-4096? Something
really crude will be fine.
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 13:49    [W:0.029 / U:8.824 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site