* Re: kmem_cache_destroy called for cache that still has objects
@ 2012-07-02 13:52 Martin Ziegler
2012-07-02 15:41 ` Jan Schmidt
0 siblings, 1 reply; 5+ messages in thread
From: Martin Ziegler @ 2012-07-02 13:52 UTC (permalink / raw)
To: Josef Bacik; +Cc: linux-btrfs@vger.kernel.org
I print the insteresting part of syslog below.
I mount the disk with
mount -t btrfs -o compress,noatime,nodiratime,noacl,noexec,nosuid /dev/sdb1 /usb
The error parts in the syslog come from the the mistaken
"mount /usb" and the line
/dev/sdb1 /usb auto defaults,noauto,noatime,nodiratime,users,noexec,nosuid,nodev,nobarrier,noauto_da_alloc,data=writeback 0 0
in fstab. I could not see other errors.
Regards,
Martin
####################################
Jul 2 12:33:57 zertz kernel: sd 10:0:0:0: [sdb] Attached SCSI disk
Jul 2 12:33:59 zertz kernel: Btrfs loaded
Jul 2 12:33:59 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2627 /dev/sdb1
Jul 2 12:33:59 zertz kernel: btrfs: turning off barriers
Jul 2 12:33:59 zertz kernel: btrfs: unrecognized mount option 'noauto_da_alloc'
Jul 2 12:33:59 zertz kernel: btrfs: open_ctree failed
Jul 2 12:34:07 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2627 /dev/sdb1
Jul 2 12:34:07 zertz kernel: btrfs: use zlib compression
Jul 2 12:34:07 zertz kernel: btrfs: disk space caching is enabled
Jul 2 12:34:07 zertz kernel: btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
Jul 2 12:35:01 zertz /USR/SBIN/CRON[8308]: (root) CMD (zanacron)
Jul 2 12:35:01 zertz zanacron[8309](root): zanacron
Jul 2 12:35:01 zertz zanacron[8309](root): runs zanacron daily_online in 2 minutes
Jul 2 12:36:23 zertz kernel: Btrfs loaded
Jul 2 12:36:23 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2635 /dev/sdb1
Jul 2 12:36:23 zertz kernel: btrfs: use zlib compression
Jul 2 12:36:23 zertz kernel: btrfs: disk space caching is enabled
Jul 2 12:36:23 zertz kernel: btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
Jul 2 12:37:00 zertz zanacron[8421](root): zanacron daily_online
Jul 2 12:37:00 zertz zanacron[8421](root): runs /bin/run-parts --report /usr/local/etc/cron/cron.daily/online
Jul 2 12:43:25 zertz kernel: =============================================================================
Jul 2 12:43:25 zertz kernel: BUG btrfs_transaction_cache (Tainted: G W ): Objects remaining on kmem_cache_close()
Jul 2 12:43:25 zertz kernel: -----------------------------------------------------------------------------
Jul 2 12:43:25 zertz kernel:
Jul 2 12:43:25 zertz kernel: INFO: Slab 0xffffea00001c7580 objects=27 used=1 fp=0xffff8800071d7e10 flags=0x4000000000004080
Jul 2 12:43:25 zertz kernel: Pid: 8613, comm: modprobe Tainted: G W 3.5.0-rc4+ #278
Jul 2 12:43:25 zertz kernel: Call Trace:
Jul 2 12:43:25 zertz kernel: [<ffffffff810c3688>] ? slab_err+0xb1/0xd3
Jul 2 12:43:25 zertz kernel: [<ffffffff810c4079>] ? unfreeze_partials+0x1b7/0x1b7
Jul 2 12:43:25 zertz kernel: [<ffffffff810c19fc>] ? ksm_migrate_page+0x2f/0x2f
Jul 2 12:43:25 zertz kernel: [<ffffffff8109a85b>] ? free_one_page+0x15c/0x20a
Jul 2 12:43:25 zertz kernel: [<ffffffff810c4a73>] ? __kmalloc+0x43/0x129
Jul 2 12:43:25 zertz kernel: [<ffffffff810c5281>] ? kmem_cache_destroy+0x146/0x2a3
Jul 2 12:43:25 zertz kernel: [<ffffffffa0414e6c>] ? btrfs_destroy_cachep+0x34/0x59 [btrfs]
Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c10>] ? btrfs_log_inode+0x448/0x448 [btrfs]
Jul 2 12:43:25 zertz kernel: [<ffffffff81065b4e>] ? sys_delete_module+0x1ca/0x24e
Jul 2 12:43:25 zertz kernel: [<ffffffff810e1e7d>] ? mntput_no_expire+0x13/0x11c
Jul 2 12:43:25 zertz kernel: [<ffffffff810cacb2>] ? filp_close+0x56/0x5d
Jul 2 12:43:25 zertz kernel: [<ffffffff8137a7e2>] ? system_call_fastpath+0x16/0x1b
Jul 2 12:43:25 zertz kernel: INFO: Object 0xffff8800071d6250 @offset=592
Jul 2 12:43:25 zertz kernel: SLUB btrfs_transaction_cache: kmem_cache_destroy called for cache that still has objects.
Jul 2 12:43:25 zertz kernel: Pid: 8613, comm: modprobe Tainted: G W 3.5.0-rc4+ #278
Jul 2 12:43:25 zertz kernel: Call Trace:
Jul 2 12:43:25 zertz kernel: [<ffffffff810c53cd>] ? kmem_cache_destroy+0x292/0x2a3
Jul 2 12:43:25 zertz kernel: [<ffffffffa0414e6c>] ? btrfs_destroy_cachep+0x34/0x59 [btrfs]
Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c10>] ? btrfs_log_inode+0x448/0x448 [btrfs]
Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c16>] ? exit_btrfs_fs+0x6/0x36 [btrfs]
Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c10>] ? btrfs_log_inode+0x448/0x448 [btrfs]
Jul 2 12:43:25 zertz kernel: [<ffffffff81065b4e>] ? sys_delete_module+0x1ca/0x24e
Jul 2 12:43:25 zertz kernel: [<ffffffff810e1e7d>] ? mntput_no_expire+0x13/0x11c
Jul 2 12:43:25 zertz kernel: [<ffffffff810cacb2>] ? filp_close+0x56/0x5d
Jul 2 12:43:25 zertz kernel: [<ffffffff8137a7e2>] ? system_call_fastpath+0x16/0x1b
Jul 2 12:43:52 zertz kernel: Btrfs loaded
Jul 2 12:43:52 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2639 /dev/sdb1
Jul 2 12:43:52 zertz kernel: btrfs: use zlib compression
Jul 2 12:43:52 zertz kernel: btrfs: disk space caching is enabled
Jul 2 12:43:52 zertz kernel: btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
###############################################################################################
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: kmem_cache_destroy called for cache that still has objects
2012-07-02 13:52 kmem_cache_destroy called for cache that still has objects Martin Ziegler
@ 2012-07-02 15:41 ` Jan Schmidt
2012-07-04 13:53 ` Jan Schmidt
0 siblings, 1 reply; 5+ messages in thread
From: Jan Schmidt @ 2012-07-02 15:41 UTC (permalink / raw)
To: ziegler; +Cc: Josef Bacik, linux-btrfs@vger.kernel.org
> I print the insteresting part of syslog below.
>
> I mount the disk with
> mount -t btrfs -o compress,noatime,nodiratime,noacl,noexec,nosuid /dev/sdb1 /usb
>
> The error parts in the syslog come from the the mistaken
> "mount /usb" and the line
> /dev/sdb1 /usb auto defaults,noauto,noatime,nodiratime,users,noexec,nosuid,nodev,nobarrier,noauto_da_alloc,data=writeback 0 0
> in fstab. I could not see other errors.
>
> Regards,
> Martin
>
> ####################################
> Jul 2 12:33:57 zertz kernel: sd 10:0:0:0: [sdb] Attached SCSI disk
> Jul 2 12:33:59 zertz kernel: Btrfs loaded
> Jul 2 12:33:59 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2627 /dev/sdb1
> Jul 2 12:33:59 zertz kernel: btrfs: turning off barriers
> Jul 2 12:33:59 zertz kernel: btrfs: unrecognized mount option 'noauto_da_alloc'
> Jul 2 12:33:59 zertz kernel: btrfs: open_ctree failed
> Jul 2 12:34:07 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2627 /dev/sdb1
> Jul 2 12:34:07 zertz kernel: btrfs: use zlib compression
> Jul 2 12:34:07 zertz kernel: btrfs: disk space caching is enabled
> Jul 2 12:34:07 zertz kernel: btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
> Jul 2 12:35:01 zertz /USR/SBIN/CRON[8308]: (root) CMD (zanacron)
> Jul 2 12:35:01 zertz zanacron[8309](root): zanacron
> Jul 2 12:35:01 zertz zanacron[8309](root): runs zanacron daily_online in 2 minutes
> Jul 2 12:36:23 zertz kernel: Btrfs loaded
> Jul 2 12:36:23 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2635 /dev/sdb1
> Jul 2 12:36:23 zertz kernel: btrfs: use zlib compression
> Jul 2 12:36:23 zertz kernel: btrfs: disk space caching is enabled
> Jul 2 12:36:23 zertz kernel: btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
> Jul 2 12:37:00 zertz zanacron[8421](root): zanacron daily_online
> Jul 2 12:37:00 zertz zanacron[8421](root): runs /bin/run-parts --report /usr/local/etc/cron/cron.daily/online
> Jul 2 12:43:25 zertz kernel: =============================================================================
> Jul 2 12:43:25 zertz kernel: BUG btrfs_transaction_cache (Tainted: G W ): Objects remaining on kmem_cache_close()
> Jul 2 12:43:25 zertz kernel: -----------------------------------------------------------------------------
> Jul 2 12:43:25 zertz kernel:
> Jul 2 12:43:25 zertz kernel: INFO: Slab 0xffffea00001c7580 objects=27 used=1 fp=0xffff8800071d7e10 flags=0x4000000000004080
> Jul 2 12:43:25 zertz kernel: Pid: 8613, comm: modprobe Tainted: G W 3.5.0-rc4+ #278
> Jul 2 12:43:25 zertz kernel: Call Trace:
> Jul 2 12:43:25 zertz kernel: [<ffffffff810c3688>] ? slab_err+0xb1/0xd3
> Jul 2 12:43:25 zertz kernel: [<ffffffff810c4079>] ? unfreeze_partials+0x1b7/0x1b7
> Jul 2 12:43:25 zertz kernel: [<ffffffff810c19fc>] ? ksm_migrate_page+0x2f/0x2f
> Jul 2 12:43:25 zertz kernel: [<ffffffff8109a85b>] ? free_one_page+0x15c/0x20a
> Jul 2 12:43:25 zertz kernel: [<ffffffff810c4a73>] ? __kmalloc+0x43/0x129
> Jul 2 12:43:25 zertz kernel: [<ffffffff810c5281>] ? kmem_cache_destroy+0x146/0x2a3
> Jul 2 12:43:25 zertz kernel: [<ffffffffa0414e6c>] ? btrfs_destroy_cachep+0x34/0x59 [btrfs]
> Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c10>] ? btrfs_log_inode+0x448/0x448 [btrfs]
> Jul 2 12:43:25 zertz kernel: [<ffffffff81065b4e>] ? sys_delete_module+0x1ca/0x24e
> Jul 2 12:43:25 zertz kernel: [<ffffffff810e1e7d>] ? mntput_no_expire+0x13/0x11c
> Jul 2 12:43:25 zertz kernel: [<ffffffff810cacb2>] ? filp_close+0x56/0x5d
> Jul 2 12:43:25 zertz kernel: [<ffffffff8137a7e2>] ? system_call_fastpath+0x16/0x1b
> Jul 2 12:43:25 zertz kernel: INFO: Object 0xffff8800071d6250 @offset=592
> Jul 2 12:43:25 zertz kernel: SLUB btrfs_transaction_cache: kmem_cache_destroy called for cache that still has objects.
> Jul 2 12:43:25 zertz kernel: Pid: 8613, comm: modprobe Tainted: G W 3.5.0-rc4+ #278
> Jul 2 12:43:25 zertz kernel: Call Trace:
> Jul 2 12:43:25 zertz kernel: [<ffffffff810c53cd>] ? kmem_cache_destroy+0x292/0x2a3
> Jul 2 12:43:25 zertz kernel: [<ffffffffa0414e6c>] ? btrfs_destroy_cachep+0x34/0x59 [btrfs]
> Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c10>] ? btrfs_log_inode+0x448/0x448 [btrfs]
> Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c16>] ? exit_btrfs_fs+0x6/0x36 [btrfs]
> Jul 2 12:43:25 zertz kernel: [<ffffffffa0451c10>] ? btrfs_log_inode+0x448/0x448 [btrfs]
> Jul 2 12:43:25 zertz kernel: [<ffffffff81065b4e>] ? sys_delete_module+0x1ca/0x24e
> Jul 2 12:43:25 zertz kernel: [<ffffffff810e1e7d>] ? mntput_no_expire+0x13/0x11c
> Jul 2 12:43:25 zertz kernel: [<ffffffff810cacb2>] ? filp_close+0x56/0x5d
> Jul 2 12:43:25 zertz kernel: [<ffffffff8137a7e2>] ? system_call_fastpath+0x16/0x1b
> Jul 2 12:43:52 zertz kernel: Btrfs loaded
> Jul 2 12:43:52 zertz kernel: device fsid e8f96f55-a297-4bb5-8e8e-2dbf7db7e7af devid 1 transid 2639 /dev/sdb1
> Jul 2 12:43:52 zertz kernel: btrfs: use zlib compression
> Jul 2 12:43:52 zertz kernel: btrfs: disk space caching is enabled
> Jul 2 12:43:52 zertz kernel: btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
> ###############################################################################################
I'm recently seeing such buffer leaks as well. It's always about tree blocks,
and it's always just two or three refs left for a buffer. I can somehow
reproduce it and will be looking into it probably tomorrow. (May still be
unrelated, of course.)
Martin, please try to maintain In-Reply-To headers.
-Jan
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: kmem_cache_destroy called for cache that still has objects
2012-07-02 15:41 ` Jan Schmidt
@ 2012-07-04 13:53 ` Jan Schmidt
0 siblings, 0 replies; 5+ messages in thread
From: Jan Schmidt @ 2012-07-04 13:53 UTC (permalink / raw)
To: ziegler; +Cc: Josef Bacik, linux-btrfs@vger.kernel.org
Hi Martin,
On 02.07.2012 17:41, Jan Schmidt wrote:
> I'm recently seeing such buffer leaks as well. It's always about tree blocks,
> and it's always just two or three refs left for a buffer. I can somehow
> reproduce it and will be looking into it probably tomorrow. (May still be
> unrelated, of course.)
Okay, I've tracked my buffer leak down. It's most likely unrelated to yours, as
you need Chris' current for-linus for that to occur. Second, you need to trigger
a lot of tree mod log operations (i.e. by calling "btrfs inspect-internal" while
modifying the trees).
I'm sending a fix for the problem I found. However, there's no obvious
reproducer for your problem yet. Can you reproduce it?
-Jan
^ permalink raw reply [flat|nested] 5+ messages in thread
* kmem_cache_destroy called for cache that still has objects
@ 2012-07-02 11:06 Martin Ziegler
2012-07-02 12:48 ` Josef Bacik
0 siblings, 1 reply; 5+ messages in thread
From: Martin Ziegler @ 2012-07-02 11:06 UTC (permalink / raw)
To: linux-btrfs
When I umounted my USB-disk today, I got the following
message:
FSSync '/usb'
=============================================================================
BUG btrfs_transaction_cache (Tainted: G W ):
Objects remaining on kmem_cache_close()
-----------------------------------------------------------------------------
INFO: Slab 0xffffea00001c7580 objects=27 used=1
fp=0xffff8800071d7e10 flags=0x4000000000004080
INFO: Object 0xffff8800071d6250 @offset=592
SLUB btrfs_transaction_cache: kmem_cache_destroy called for
cache that still has objects.
This had no bad consequences (I hope), but may interest the
developers. The kernel is
Linux zertz 3.5.0-rc4+ #278 SMP Thu Jun 28 21:17:37 CEST
2012 x86_64 GNU/Linux.
Regards,
Martin
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: kmem_cache_destroy called for cache that still has objects
2012-07-02 11:06 Martin Ziegler
@ 2012-07-02 12:48 ` Josef Bacik
0 siblings, 0 replies; 5+ messages in thread
From: Josef Bacik @ 2012-07-02 12:48 UTC (permalink / raw)
To: Martin Ziegler; +Cc: linux-btrfs@vger.kernel.org
On Mon, Jul 02, 2012 at 05:06:27AM -0600, Martin Ziegler wrote:
> When I umounted my USB-disk today, I got the following
> message:
>
> FSSync '/usb'
> =============================================================================
> BUG btrfs_transaction_cache (Tainted: G W ):
> Objects remaining on kmem_cache_close()
> -----------------------------------------------------------------------------
>
> INFO: Slab 0xffffea00001c7580 objects=27 used=1
> fp=0xffff8800071d7e10 flags=0x4000000000004080
> INFO: Object 0xffff8800071d6250 @offset=592
> SLUB btrfs_transaction_cache: kmem_cache_destroy called for
> cache that still has objects.
>
>
> This had no bad consequences (I hope), but may interest the
> developers. The kernel is
>
> Linux zertz 3.5.0-rc4+ #278 SMP Thu Jun 28 21:17:37 CEST
> 2012 x86_64 GNU/Linux.
>
Did you have an aborted transaction or anything, any other errors in your dmesg?
Thanks,
Josef
^ permalink raw reply [flat|nested] 5+ messages in thread
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2012-07-02 13:52 kmem_cache_destroy called for cache that still has objects Martin Ziegler
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