* Unloading sym53c8xx driver causes ___free_dma_mem_cluster warnings
@ 2010-11-16 19:13 Wolfgang Denk
2010-11-16 19:27 ` Matthew Wilcox
0 siblings, 1 reply; 2+ messages in thread
From: Wolfgang Denk @ 2010-11-16 19:13 UTC (permalink / raw)
To: linux-scsi; +Cc: Matthew Wilcox, linux-kernel
Hi,
when unloading the sym53c8xx driver a number of kernel warning
messages are printed:
[511902.538283] sym0: detaching ...
[511902.538286] sym0: resetting chip
[511902.538319] ------------[ cut here ]------------
[511902.538326] WARNING: at /builddir/build/BUILD/kernel-2.6.35.fc14/linux-2.6.35.i686/arch/x86/include/asm/dma-mapping.h:155 ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]()
[511902.538330] Hardware name: EP35C-DS3R
[511902.538332] Modules linked in: sym53c8xx(-) osst ch nfs fscache fuse ebtable_nat ebtables bridge stp llc nfsd lockd nfs_acl auth_rpcgss it87 hwmon_vid coretemp tun sunrpc cpufreq_ondemand acpi_cpufreq mperf ipv6 kqemu kvm_intel kvm uinput snd_hda_codec_realtek nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device ppdev snd_pcm snd_timer snd parport_pc iTCO_wdt iTCO_vendor_support i2c_i801 parport r8169 mii i2c_core soundcore pl2303 usbserial snd_page_alloc microcode xfs exportfs raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx pata_acpi ata_generic pata_jmicron scsi_transport_spi [last unloaded: st]
[511902.538377] Pid: 4582, comm: rmmod Tainted: P W 2.6.35.6-48.fc14.i686.PAE #1
[511902.538377] Call Trace:
[511902.538377] [<c043fbd1>] warn_slowpath_common+0x6a/0x7f
[511902.538377] [<ef2b8e7f>] ? ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538377] [<c043fbfa>] warn_slowpath_null+0x14/0x18
[511902.538377] [<ef2b8e7f>] ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538377] [<ef2b8dac>] __sym_mfree+0x5c/0xa2 [sym53c8xx]
[511902.538377] [<c0464de9>] ? __raw_local_irq_save+0x19/0x1e
[511902.538377] [<ef2b91bf>] __sym_mfree_dma+0x3c/0x5d [sym53c8xx]
[511902.538377] [<ef2b8be1>] sym_hcb_free+0x72/0x185 [sym53c8xx]
[511902.538377] [<ef2b169d>] sym_free_resources+0x4c/0x6b [sym53c8xx]
[511902.538377] [<ef2b174a>] sym_detach+0x8e/0xa2 [sym53c8xx]
[511902.538377] [<ef2b1782>] sym2_remove+0x24/0x3c [sym53c8xx]
[511902.538377] [<c05cd7a8>] pci_device_remove+0x1e/0x3e
[511902.538377] [<c0661457>] __device_release_driver+0x62/0xa4
[511902.538377] [<c0661a40>] driver_detach+0x62/0x82
[511902.538377] [<c066133a>] bus_remove_driver+0x8d/0xc7
[511902.538377] [<c0661ad4>] driver_unregister+0x50/0x57
[511902.538377] [<c05cd982>] pci_unregister_driver+0x32/0x67
[511902.538377] [<c04662cf>] ? cpumask_next+0x17/0x19
[511902.538377] [<ef2ba37a>] sym2_exit+0x12/0x87 [sym53c8xx]
[511902.538377] [<c0467333>] sys_delete_module+0x181/0x1de
[511902.538377] [<c07bc1dd>] ? do_page_fault+0x219/0x275
[511902.538377] [<c07bc20b>] ? do_page_fault+0x247/0x275
[511902.538377] [<c047fdb7>] ? audit_syscall_entry+0x116/0x138
[511902.538377] [<c040899f>] sysenter_do_call+0x12/0x28
[511902.538377] ---[ end trace 23e07d0c130b5514 ]---
[511902.538521] ------------[ cut here ]------------
[511902.538527] WARNING: at /builddir/build/BUILD/kernel-2.6.35.fc14/linux-2.6.35.i686/arch/x86/include/asm/dma-mapping.h:155 ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]()
[511902.538531] Hardware name: EP35C-DS3R
[511902.538532] Modules linked in: sym53c8xx(-) osst ch nfs fscache fuse ebtable_nat ebtables bridge stp llc nfsd lockd nfs_acl auth_rpcgss it87 hwmon_vid coretemp tun sunrpc cpufreq_ondemand acpi_cpufreq mperf ipv6 kqemu kvm_intel kvm uinput snd_hda_codec_realtek nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device ppdev snd_pcm snd_timer snd parport_pc iTCO_wdt iTCO_vendor_support i2c_i801 parport r8169 mii i2c_core soundcore pl2303 usbserial snd_page_alloc microcode xfs exportfs raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx pata_acpi ata_generic pata_jmicron scsi_transport_spi [last unloaded: st]
[511902.538583] Pid: 4582, comm: rmmod Tainted: P W 2.6.35.6-48.fc14.i686.PAE #1
[511902.538585] Call Trace:
[511902.538589] [<c043fbd1>] warn_slowpath_common+0x6a/0x7f
[511902.538595] [<ef2b8e7f>] ? ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538599] [<c043fbfa>] warn_slowpath_null+0x14/0x18
[511902.538604] [<ef2b8e7f>] ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538610] [<ef2b8dac>] __sym_mfree+0x5c/0xa2 [sym53c8xx]
[511902.538614] [<c0464de9>] ? __raw_local_irq_save+0x19/0x1e
[511902.538619] [<ef2b91bf>] __sym_mfree_dma+0x3c/0x5d [sym53c8xx]
[511902.538625] [<ef2b8c01>] sym_hcb_free+0x92/0x185 [sym53c8xx]
[511902.538630] [<ef2b169d>] sym_free_resources+0x4c/0x6b [sym53c8xx]
[511902.538635] [<ef2b174a>] sym_detach+0x8e/0xa2 [sym53c8xx]
[511902.538640] [<ef2b1782>] sym2_remove+0x24/0x3c [sym53c8xx]
[511902.538643] [<c05cd7a8>] pci_device_remove+0x1e/0x3e
[511902.538647] [<c0661457>] __device_release_driver+0x62/0xa4
[511902.538650] [<c0661a40>] driver_detach+0x62/0x82
[511902.538654] [<c066133a>] bus_remove_driver+0x8d/0xc7
[511902.538657] [<c0661ad4>] driver_unregister+0x50/0x57
[511902.538660] [<c05cd982>] pci_unregister_driver+0x32/0x67
[511902.538664] [<c04662cf>] ? cpumask_next+0x17/0x19
[511902.538669] [<ef2ba37a>] sym2_exit+0x12/0x87 [sym53c8xx]
[511902.538673] [<c0467333>] sys_delete_module+0x181/0x1de
[511902.538677] [<c07bc1dd>] ? do_page_fault+0x219/0x275
[511902.538680] [<c07bc20b>] ? do_page_fault+0x247/0x275
[511902.538684] [<c047fdb7>] ? audit_syscall_entry+0x116/0x138
[511902.538688] [<c040899f>] sysenter_do_call+0x12/0x28
[511902.538690] ---[ end trace 23e07d0c130b5515 ]---
[511902.538693] ------------[ cut here ]------------
[511902.538698] WARNING: at /builddir/build/BUILD/kernel-2.6.35.fc14/linux-2.6.35.i686/arch/x86/include/asm/dma-mapping.h:155 ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]()
[511902.538702] Hardware name: EP35C-DS3R
[511902.538703] Modules linked in: sym53c8xx(-) osst ch nfs fscache fuse ebtable_nat ebtables bridge stp llc nfsd lockd nfs_acl auth_rpcgss it87 hwmon_vid coretemp tun sunrpc cpufreq_ondemand acpi_cpufreq mperf ipv6 kqemu kvm_intel kvm uinput snd_hda_codec_realtek nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device ppdev snd_pcm snd_timer snd parport_pc iTCO_wdt iTCO_vendor_support i2c_i801 parport r8169 mii i2c_core soundcore pl2303 usbserial snd_page_alloc microcode xfs exportfs raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx pata_acpi ata_generic pata_jmicron scsi_transport_spi [last unloaded: st]
[511902.538754] Pid: 4582, comm: rmmod Tainted: P W 2.6.35.6-48.fc14.i686.PAE #1
[511902.538756] Call Trace:
[511902.538760] [<c043fbd1>] warn_slowpath_common+0x6a/0x7f
[511902.538765] [<ef2b8e7f>] ? ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538769] [<c043fbfa>] warn_slowpath_null+0x14/0x18
[511902.538775] [<ef2b8e7f>] ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538781] [<ef2b8dac>] __sym_mfree+0x5c/0xa2 [sym53c8xx]
[511902.538784] [<c0464de9>] ? __raw_local_irq_save+0x19/0x1e
[511902.538790] [<ef2b91bf>] __sym_mfree_dma+0x3c/0x5d [sym53c8xx]
[511902.538795] [<ef2b8c21>] sym_hcb_free+0xb2/0x185 [sym53c8xx]
[511902.538800] [<ef2b169d>] sym_free_resources+0x4c/0x6b [sym53c8xx]
[511902.538805] [<ef2b174a>] sym_detach+0x8e/0xa2 [sym53c8xx]
[511902.538810] [<ef2b1782>] sym2_remove+0x24/0x3c [sym53c8xx]
[511902.538814] [<c05cd7a8>] pci_device_remove+0x1e/0x3e
[511902.538817] [<c0661457>] __device_release_driver+0x62/0xa4
[511902.538821] [<c0661a40>] driver_detach+0x62/0x82
[511902.538824] [<c066133a>] bus_remove_driver+0x8d/0xc7
[511902.538827] [<c0661ad4>] driver_unregister+0x50/0x57
[511902.538831] [<c05cd982>] pci_unregister_driver+0x32/0x67
[511902.538834] [<c04662cf>] ? cpumask_next+0x17/0x19
[511902.538839] [<ef2ba37a>] sym2_exit+0x12/0x87 [sym53c8xx]
[511902.538843] [<c0467333>] sys_delete_module+0x181/0x1de
[511902.538847] [<c07bc1dd>] ? do_page_fault+0x219/0x275
[511902.538850] [<c07bc20b>] ? do_page_fault+0x247/0x275
[511902.538854] [<c047fdb7>] ? audit_syscall_entry+0x116/0x138
[511902.538858] [<c040899f>] sysenter_do_call+0x12/0x28
[511902.538861] ---[ end trace 23e07d0c130b5516 ]---
[511902.538864] ------------[ cut here ]------------
[511902.538870] WARNING: at /builddir/build/BUILD/kernel-2.6.35.fc14/linux-2.6.35.i686/arch/x86/include/asm/dma-mapping.h:155 ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]()
[511902.538873] Hardware name: EP35C-DS3R
[511902.538875] Modules linked in: sym53c8xx(-) osst ch nfs fscache fuse ebtable_nat ebtables bridge stp llc nfsd lockd nfs_acl auth_rpcgss it87 hwmon_vid coretemp tun sunrpc cpufreq_ondemand acpi_cpufreq mperf ipv6 kqemu kvm_intel kvm uinput snd_hda_codec_realtek nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device ppdev snd_pcm snd_timer snd parport_pc iTCO_wdt iTCO_vendor_support i2c_i801 parport r8169 mii i2c_core soundcore pl2303 usbserial snd_page_alloc microcode xfs exportfs raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx pata_acpi ata_generic pata_jmicron scsi_transport_spi [last unloaded: st]
[511902.538925] Pid: 4582, comm: rmmod Tainted: P W 2.6.35.6-48.fc14.i686.PAE #1
[511902.538928] Call Trace:
[511902.538931] [<c043fbd1>] warn_slowpath_common+0x6a/0x7f
[511902.538937] [<ef2b8e7f>] ? ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538941] [<c043fbfa>] warn_slowpath_null+0x14/0x18
[511902.538947] [<ef2b8e7f>] ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.538952] [<ef2b8dac>] __sym_mfree+0x5c/0xa2 [sym53c8xx]
[511902.538958] [<ef2b91bf>] __sym_mfree_dma+0x3c/0x5d [sym53c8xx]
[511902.538964] [<ef2b8cb8>] sym_hcb_free+0x149/0x185 [sym53c8xx]
[511902.538969] [<ef2b169d>] sym_free_resources+0x4c/0x6b [sym53c8xx]
[511902.538974] [<ef2b174a>] sym_detach+0x8e/0xa2 [sym53c8xx]
[511902.538979] [<ef2b1782>] sym2_remove+0x24/0x3c [sym53c8xx]
[511902.538982] [<c05cd7a8>] pci_device_remove+0x1e/0x3e
[511902.538986] [<c0661457>] __device_release_driver+0x62/0xa4
[511902.538989] [<c0661a40>] driver_detach+0x62/0x82
[511902.538992] [<c066133a>] bus_remove_driver+0x8d/0xc7
[511902.538996] [<c0661ad4>] driver_unregister+0x50/0x57
[511902.538999] [<c05cd982>] pci_unregister_driver+0x32/0x67
[511902.539002] [<c04662cf>] ? cpumask_next+0x17/0x19
[511902.539008] [<ef2ba37a>] sym2_exit+0x12/0x87 [sym53c8xx]
[511902.539011] [<c0467333>] sys_delete_module+0x181/0x1de
[511902.539015] [<c07bc1dd>] ? do_page_fault+0x219/0x275
[511902.539019] [<c07bc20b>] ? do_page_fault+0x247/0x275
[511902.539022] [<c047fdb7>] ? audit_syscall_entry+0x116/0x138
[511902.539026] [<c040899f>] sysenter_do_call+0x12/0x28
[511902.539029] ---[ end trace 23e07d0c130b5517 ]---
[511902.539032] ------------[ cut here ]------------
[511902.539038] WARNING: at /builddir/build/BUILD/kernel-2.6.35.fc14/linux-2.6.35.i686/arch/x86/include/asm/dma-mapping.h:155 ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]()
[511902.539041] Hardware name: EP35C-DS3R
[511902.539043] Modules linked in: sym53c8xx(-) osst ch nfs fscache fuse ebtable_nat ebtables bridge stp llc nfsd lockd nfs_acl auth_rpcgss it87 hwmon_vid coretemp tun sunrpc cpufreq_ondemand acpi_cpufreq mperf ipv6 kqemu kvm_intel kvm uinput snd_hda_codec_realtek nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device ppdev snd_pcm snd_timer snd parport_pc iTCO_wdt iTCO_vendor_support i2c_i801 parport r8169 mii i2c_core soundcore pl2303 usbserial snd_page_alloc microcode xfs exportfs raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx pata_acpi ata_generic pata_jmicron scsi_transport_spi [last unloaded: st]
[511902.539093] Pid: 4582, comm: rmmod Tainted: P W 2.6.35.6-48.fc14.i686.PAE #1
[511902.539095] Call Trace:
[511902.539099] [<c043fbd1>] warn_slowpath_common+0x6a/0x7f
[511902.539105] [<ef2b8e7f>] ? ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.539109] [<c043fbfa>] warn_slowpath_null+0x14/0x18
[511902.539114] [<ef2b8e7f>] ___free_dma_mem_cluster+0x45/0xc7 [sym53c8xx]
[511902.539120] [<ef2b8dac>] __sym_mfree+0x5c/0xa2 [sym53c8xx]
[511902.539126] [<ef2b91bf>] __sym_mfree_dma+0x3c/0x5d [sym53c8xx]
[511902.539131] [<ef2b16b4>] sym_free_resources+0x63/0x6b [sym53c8xx]
[511902.539136] [<ef2b174a>] sym_detach+0x8e/0xa2 [sym53c8xx]
[511902.539141] [<ef2b1782>] sym2_remove+0x24/0x3c [sym53c8xx]
[511902.539144] [<c05cd7a8>] pci_device_remove+0x1e/0x3e
[511902.539148] [<c0661457>] __device_release_driver+0x62/0xa4
[511902.539151] [<c0661a40>] driver_detach+0x62/0x82
[511902.539154] [<c066133a>] bus_remove_driver+0x8d/0xc7
[511902.539157] [<c0661ad4>] driver_unregister+0x50/0x57
[511902.539161] [<c05cd982>] pci_unregister_driver+0x32/0x67
[511902.539164] [<c04662cf>] ? cpumask_next+0x17/0x19
[511902.539170] [<ef2ba37a>] sym2_exit+0x12/0x87 [sym53c8xx]
[511902.539173] [<c0467333>] sys_delete_module+0x181/0x1de
[511902.539177] [<c07bc1dd>] ? do_page_fault+0x219/0x275
[511902.539181] [<c07bc20b>] ? do_page_fault+0x247/0x275
[511902.539184] [<c047fdb7>] ? audit_syscall_entry+0x116/0x138
[511902.539188] [<c040899f>] sysenter_do_call+0x12/0x28
[511902.539191] ---[ end trace 23e07d0c130b5518 ]---
[511902.541664] sym53c8xx 0000:05:00.0: PCI INT A disabled
This is a long standing problem - I reported it more than a yar ago as
Fedora bug # 534161, see
https://bugzilla.redhat.com/show_bug.cgi?id=534161
Recently I receieved the following advice:
| Stanislaw Gruszka 2010-10-03 09:37:31 EDT
|
| I looked at the code (gash, the sym53c8xx_2 is one big mess).
|
| First in __sym_mfree_dma we take spin_lock_irqsave(&sym53c8xx_lock,
| flags) then after some complex logic call dma_free_coherent().
| Since interrupts are disabled WARN_ON(irqs_disabled()) print a
| message and call trace.
|
| I don't know how to solve it. One solution is move
| dma_free_coherent after spin_lock_irqrestore in __sys_mfree_dma,
| but as told logic is quite complex. Second is remove WARN_ON from
| dma_free_coherent. I have no idea why this warning is there -
| free_something functions should be callable from any context.
|
| Anyway this is not fixed mainline. Wolfgang, please report problem
| to proper upstream maintainers. If we get upstream solution, we can
| put it in fedora then.
OK, so I'm posting it here.
Thanks in advance.
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
The human mind ordinarily operates at only ten percent of its
capacity. The rest is overhead for the operating system.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Unloading sym53c8xx driver causes ___free_dma_mem_cluster warnings
2010-11-16 19:13 Unloading sym53c8xx driver causes ___free_dma_mem_cluster warnings Wolfgang Denk
@ 2010-11-16 19:27 ` Matthew Wilcox
0 siblings, 0 replies; 2+ messages in thread
From: Matthew Wilcox @ 2010-11-16 19:27 UTC (permalink / raw)
To: Wolfgang Denk; +Cc: linux-scsi, linux-kernel
On Tue, Nov 16, 2010 at 08:13:09PM +0100, Wolfgang Denk wrote:
> Hi,
>
> when unloading the sym53c8xx driver a number of kernel warning
> messages are printed:
Yes, this is well known (if you search the scsi archives, you'll find
several previous reports). It's harmless -- the only place it could hurt
is on ARM, and I've never heard of anyone plugging a sym2 card into an
ARM machine.
The fix would be quite involved, and the driver really isn't worth fixing
-- the hardware tops out at 160 MB/s which is an order of magnitude
lower performance than the hardware I'm currently working on.
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-11-16 19:13 Unloading sym53c8xx driver causes ___free_dma_mem_cluster warnings Wolfgang Denk
2010-11-16 19:27 ` Matthew Wilcox
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