From: Dave Hansen <haveblue@us.ibm.com>
To: Andrea Arcangeli <andrea@novell.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@suse.de>, Andrew Morton <akpm@osdl.org>
Subject: Re: fix iounmap and a pageattr memleak (x86 and x86-64)
Date: Wed, 03 Nov 2004 11:37:16 -0800 [thread overview]
Message-ID: <4189336C.6030903@us.ibm.com> (raw)
In-Reply-To: <20041103030558.GK3571@dualathlon.random>
Andrea Arcangeli wrote:
>>I'll see what I can do to get some backtraces of the __pg_prot(0) &&
>>page->mapped cases.
These appear to be the 2 most common paths: cache_init_objs() and
kfree(). But, the path that I'm hitting now appears to be that
something got page_count(kpte_page) to -1 (*NOT* page->_count), and then
the BUG_ON() trips after a get_page() is done on it. I'm tracking this
down now.
kpte: c0011000
address: c1a00000
kpte_page: c1000264
split: ffffffff
pgprot_val(prot): 00000000
pgprot_val(PAGE_KERNEL): 00000163
(pte_val(*kpte) & _PAGE_PSE): 00000000
path: 1
Badness in __change_page_attr at arch/i386/mm/pageattr.c:156
[<c0114e43>] __change_page_attr+0x443/0x5a4
[<c01150d9>] kernel_map_pages+0x31/0x80
[<c0114fda>] change_page_attr+0x36/0x54
[<c01150f3>] kernel_map_pages+0x4b/0x80
[<c013de18>] cache_init_objs+0x194/0x1d8
[<c013e014>] cache_grow+0xe8/0x154
[<c013e74a>] cache_alloc_refill+0x226/0x274
[<c013edb3>] __kmalloc+0x8b/0xbc
[<c0181302>] proc_create+0x76/0xcc
[<c01814c3>] create_proc_entry+0x6b/0xb4
[<c0121c3b>] register_proc_table+0xcb/0x110
[<c0121c67>] register_proc_table+0xf7/0x110
[<c0420994>] sysctl_init+0x10/0x1c
[<c0413934>] do_basic_setup+0x14/0x20
[<c01004ec>] init+0xa8/0x15c
[<c0100444>] init+0x0/0x15c
[<c0102305>] kernel_thread_helper+0x5/0xc
kpte: c0006978
address: c052f000
kpte_page: c10000d8
split: ffffffff
pgprot_val(prot): 00000000
pgprot_val(PAGE_KERNEL): 00000163
(pte_val(*kpte) & _PAGE_PSE): 00000000
path: 1
Badness in __change_page_attr at arch/i386/mm/pageattr.c:156
[<c0114e43>] __change_page_attr+0x443/0x5a4
[<c02367db>] scsi_run_queue+0xaf/0xb8
[<c0114fda>] change_page_attr+0x36/0x54
[<c01150f3>] kernel_map_pages+0x4b/0x80
[<c013e422>] cache_free_debugcheck+0x2a6/0x2c0
[<c02385a5>] scsi_probe_and_add_lun+0x135/0x188
[<c013f00b>] kfree+0x9f/0xdc
[<c02385a5>] scsi_probe_and_add_lun+0x135/0x188
[<c02385a5>] scsi_probe_and_add_lun+0x135/0x188
[<c0238ac7>] scsi_scan_target+0x63/0xbc
[<c0238b60>] scsi_scan_channel+0x40/0x68
[<c0238bfe>] scsi_scan_host_selected+0x76/0xb0
[<c0238c4a>] scsi_scan_host+0x12/0x18
[<c024b7ff>] ahc_linux_register_host+0x283/0x290
[<c01857e9>] sysfs_create_file+0x41/0x48
[<c01e4392>] pci_create_newid_file+0x1a/0x24
[<c01e470a>] pci_populate_driver_dir+0xa/0x10
[<c01e4786>] pci_register_driver+0x76/0x88
[<c024a867>] ahc_linux_detect+0x3b/0x60
[<c042750a>] ahc_linux_init+0xa/0x30
[<c04138ca>] do_initcalls+0x66/0xbc
[<c041393e>] do_basic_setup+0x1e/0x20
[<c01004ec>] init+0xa8/0x15c
[<c0100444>] init+0x0/0x15c
[<c0102305>] kernel_thread_helper+0x5/0xc
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <haveblue@us.ibm.com>
To: Andrea Arcangeli <andrea@novell.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@suse.de>, Andrew Morton <akpm@osdl.org>
Subject: Re: fix iounmap and a pageattr memleak (x86 and x86-64)
Date: Wed, 03 Nov 2004 11:37:16 -0800 [thread overview]
Message-ID: <4189336C.6030903@us.ibm.com> (raw)
In-Reply-To: <20041103030558.GK3571@dualathlon.random>
Andrea Arcangeli wrote:
>>I'll see what I can do to get some backtraces of the __pg_prot(0) &&
>>page->mapped cases.
These appear to be the 2 most common paths: cache_init_objs() and
kfree(). But, the path that I'm hitting now appears to be that
something got page_count(kpte_page) to -1 (*NOT* page->_count), and then
the BUG_ON() trips after a get_page() is done on it. I'm tracking this
down now.
kpte: c0011000
address: c1a00000
kpte_page: c1000264
split: ffffffff
pgprot_val(prot): 00000000
pgprot_val(PAGE_KERNEL): 00000163
(pte_val(*kpte) & _PAGE_PSE): 00000000
path: 1
Badness in __change_page_attr at arch/i386/mm/pageattr.c:156
[<c0114e43>] __change_page_attr+0x443/0x5a4
[<c01150d9>] kernel_map_pages+0x31/0x80
[<c0114fda>] change_page_attr+0x36/0x54
[<c01150f3>] kernel_map_pages+0x4b/0x80
[<c013de18>] cache_init_objs+0x194/0x1d8
[<c013e014>] cache_grow+0xe8/0x154
[<c013e74a>] cache_alloc_refill+0x226/0x274
[<c013edb3>] __kmalloc+0x8b/0xbc
[<c0181302>] proc_create+0x76/0xcc
[<c01814c3>] create_proc_entry+0x6b/0xb4
[<c0121c3b>] register_proc_table+0xcb/0x110
[<c0121c67>] register_proc_table+0xf7/0x110
[<c0420994>] sysctl_init+0x10/0x1c
[<c0413934>] do_basic_setup+0x14/0x20
[<c01004ec>] init+0xa8/0x15c
[<c0100444>] init+0x0/0x15c
[<c0102305>] kernel_thread_helper+0x5/0xc
kpte: c0006978
address: c052f000
kpte_page: c10000d8
split: ffffffff
pgprot_val(prot): 00000000
pgprot_val(PAGE_KERNEL): 00000163
(pte_val(*kpte) & _PAGE_PSE): 00000000
path: 1
Badness in __change_page_attr at arch/i386/mm/pageattr.c:156
[<c0114e43>] __change_page_attr+0x443/0x5a4
[<c02367db>] scsi_run_queue+0xaf/0xb8
[<c0114fda>] change_page_attr+0x36/0x54
[<c01150f3>] kernel_map_pages+0x4b/0x80
[<c013e422>] cache_free_debugcheck+0x2a6/0x2c0
[<c02385a5>] scsi_probe_and_add_lun+0x135/0x188
[<c013f00b>] kfree+0x9f/0xdc
[<c02385a5>] scsi_probe_and_add_lun+0x135/0x188
[<c02385a5>] scsi_probe_and_add_lun+0x135/0x188
[<c0238ac7>] scsi_scan_target+0x63/0xbc
[<c0238b60>] scsi_scan_channel+0x40/0x68
[<c0238bfe>] scsi_scan_host_selected+0x76/0xb0
[<c0238c4a>] scsi_scan_host+0x12/0x18
[<c024b7ff>] ahc_linux_register_host+0x283/0x290
[<c01857e9>] sysfs_create_file+0x41/0x48
[<c01e4392>] pci_create_newid_file+0x1a/0x24
[<c01e470a>] pci_populate_driver_dir+0xa/0x10
[<c01e4786>] pci_register_driver+0x76/0x88
[<c024a867>] ahc_linux_detect+0x3b/0x60
[<c042750a>] ahc_linux_init+0xa/0x30
[<c04138ca>] do_initcalls+0x66/0xbc
[<c041393e>] do_basic_setup+0x1e/0x20
[<c01004ec>] init+0xa8/0x15c
[<c0100444>] init+0x0/0x15c
[<c0102305>] kernel_thread_helper+0x5/0xc
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"aart@kvack.org"> aart@kvack.org </a>
next prev parent reply other threads:[~2004-11-03 19:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-02 21:21 fix iounmap and a pageattr memleak (x86 and x86-64) Dave Hansen
2004-11-02 21:21 ` Dave Hansen
2004-11-02 22:07 ` Andrea Arcangeli
2004-11-02 22:07 ` Andrea Arcangeli
2004-11-02 22:21 ` Dave Hansen
2004-11-02 22:21 ` Dave Hansen
2004-11-02 22:29 ` Andrew Morton
2004-11-02 22:29 ` Andrew Morton
2004-11-02 22:34 ` Dave Hansen
2004-11-02 22:34 ` Dave Hansen
2004-11-03 0:54 ` Andrea Arcangeli
2004-11-03 0:54 ` Andrea Arcangeli
2004-11-02 22:45 ` Dave Hansen
2004-11-02 23:00 ` Dave Hansen
2004-11-02 23:00 ` Dave Hansen
2004-11-03 1:35 ` Andrea Arcangeli
2004-11-03 1:35 ` Andrea Arcangeli
2004-11-03 1:43 ` Dave Hansen
2004-11-03 1:43 ` Dave Hansen
2004-11-03 2:26 ` Andrea Arcangeli
2004-11-03 2:26 ` Andrea Arcangeli
2004-11-03 2:48 ` Dave Hansen
2004-11-03 2:48 ` Dave Hansen
2004-11-03 3:05 ` Andrea Arcangeli
2004-11-03 3:05 ` Andrea Arcangeli
2004-11-03 19:37 ` Dave Hansen [this message]
2004-11-03 19:37 ` Dave Hansen
2004-11-05 0:02 ` Dave Hansen
2004-11-05 0:40 ` Dave Hansen
2004-11-05 0:53 ` Andrea Arcangeli
2004-11-05 0:53 ` Andrea Arcangeli
2004-11-05 1:55 ` Dave Hansen
2004-11-05 1:55 ` Dave Hansen
2004-11-05 2:08 ` Andrea Arcangeli
2004-11-05 2:08 ` Andrea Arcangeli
2004-11-05 2:23 ` Dave Hansen
2004-11-05 4:03 ` Andrea Arcangeli
2004-11-05 4:03 ` Andrea Arcangeli
2004-11-05 4:20 ` Andrea Arcangeli
2004-11-05 4:20 ` Andrea Arcangeli
2004-11-02 23:04 ` Andrew Morton
2004-11-02 23:04 ` Andrew Morton
2004-11-03 1:40 ` Andrea Arcangeli
2004-11-03 1:40 ` Andrea Arcangeli
2004-11-02 22:34 ` Jason Baron
2004-11-02 22:34 ` Jason Baron
2004-11-02 23:12 ` Andrea Arcangeli
2004-11-02 23:12 ` Andrea Arcangeli
-- strict thread matches above, loose matches on Subject: below --
2004-10-28 19:21 Andrea Arcangeli
2004-11-05 8:07 ` Andrea Arcangeli
2004-11-05 8:31 ` Andi Kleen
2004-11-05 8:49 ` Andrea Arcangeli
2005-02-14 23:15 ` Andrea Arcangeli
2005-02-15 10:39 ` Andi Kleen
2005-02-15 10:48 ` Andrea Arcangeli
2005-02-15 10:51 ` Andi Kleen
2005-02-15 11:11 ` Andrea Arcangeli
2005-02-15 13:14 ` Hugh Dickins
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4189336C.6030903@us.ibm.com \
--to=haveblue@us.ibm.com \
--cc=ak@suse.de \
--cc=akpm@osdl.org \
--cc=andrea@novell.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.