The patch titled
proc: print more information when removing non-empty directories
has been added to the -mm tree. Its filename is
proc-print-more-information-when-removing-non-empty-directories.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: proc: print more information when removing non-empty directories
From: Alexey Dobriyan <adobriyan@xxxxx>
This usually saves one recompile to insert similar printk like below. :)
Sample nastygram:
remove_proc_entry: removing non-empty directory '/proc/foo', leaking at least 'bar'
------------[ cut here ]------------
WARNING: at fs/proc/generic.c:776 remove_proc_entry+0x18a/0x200()
Modules linked in: foo(-) container fan battery dock sbs ac sbshc backlight ipv6 loop af_packet amd_rng sr_mod i2c_amd8111 i2c_amd756 cdrom i2c_core button thermal processor
Pid: 3034, comm: rmmod Tainted: G M 2.6.25-rc1 #5
Call Trace:
[<ffffffff80231974>] warn_on_slowpath+0x64/0x90
[<ffffffff80232a6e>] printk+0x4e/0x60
[<ffffffff802d6c8a>] remove_proc_entry+0x18a/0x200
[<ffffffff8045cd88>] mutex_lock_nested+0x1c8/0x2d0
[<ffffffff8025f0f0>] __try_stop_module+0x0/0x40
[<ffffffff8025effd>] sys_delete_module+0x14d/0x200
[<ffffffff8045df3d>] lockdep_sys_exit_thunk+0x35/0x67
[<ffffffff8031c307>] __up_read+0x27/0xa0
[<ffffffff8045decc>] trace_hardirqs_on_thunk+0x35/0x3a
[<ffffffff8020b6ab>] system_call_after_swapgs+0x7b/0x80
---[ end trace 10ef850597e89c54 ]---
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxx>
Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/generic.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff -puN fs/proc/generic.c~proc-print-more-information-when-removing-non-empty-directories fs/proc/generic.c
--- a/fs/proc/generic.c~proc-print-more-information-when-removing-non-empty-directories
+++ a/fs/proc/generic.c
@@ -769,7 +769,12 @@ continue_removing:
if (S_ISDIR(de->mode))
parent->nlink--;
de->nlink = 0;
- WARN_ON(de->subdir);
+ if (de->subdir) {
+ printk(KERN_WARNING "%s: removing non-empty directory "
+ "'%s/%s', leaking at least '%s'\n", __func__,
+ de->parent->name, de->name, de->subdir->name);
+ WARN_ON(1);
+ }
if (atomic_dec_and_test(&de->count))
free_proc_entry(de);
break;
_
Patches currently in -mm which might be from adobriyan@xxxxx are
origin.patch
proc-print-more-information-when-removing-non-empty-directories.patch
single_open-seq_release-leak-diagnostics.patch
-
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