On Tue, May 18, 2010 at 8:39 PM, Chris Ball <cjb@xxxxxxxxxx> wrote: > Hi, > > > In one ARM based boards I am facing soft lock up issue while > > inserting/removing MMC/SD card continuously having 2K files. Can > > someone point me where should i look whether host controller > > driver or MMC block layer/Kernel block layer?? > > Could be any of the above, but perhaps most likely your host > controller driver -- which one are you using? Can you perform > alt-sysrq-t when the lockup happens, or get a kgdb backtrace? > I am using Samsung Host controller and below is the complete backtrace.Also in card detect interrupt handller we are using tasklet which finally calls mmc_scan() i.e. workfunction having 200 ms delay,but while debugging the issue we found that mmc_rescan() is called very late and in the mean time kernel blk/mmc blk layer keep on requesting (using mmc_request(), mmc_queue_thread()) to Host controller eventhough SD card is removed. [ 110.181670] Backtrace: [ 110.184099] [<c0139b64>] (__bug+0x0/0x2c) from [<c0294580>] (elv_rb_del+0x34/0x54) [ 110.191645] [<c029454c>] (elv_rb_del+0x0/0x54) from [<c02a0a98>] (cfq_remove_request+0x104/0x1bc) [ 110.200492] r5:dac34058 r4:df7ff360 [ 110.204047] [<c02a0994>] (cfq_remove_request+0x0/0x1bc) from [<c02a0b78>] (cfq_dispatch_insert+0x28/0x58) [ 110.213588] [<c02a0b50>] (cfq_dispatch_insert+0x0/0x58) from [<c02a0bf8>] (cfq_add_rq_rb+0x50/0xd4) [ 110.222608] r7:dac34074 r6:df7ff360 r5:c4596100 r4:dac34058 [ 110.228245] [<c02a0ba8>] (cfq_add_rq_rb+0x0/0xd4) from [<c02a0cb4>] (cfq_insert_request+0x38/0x360) [ 110.237266] r7:df7ff360 r6:dac34058 r5:c33b4a40 r4:df7ff360 [ 110.242903] [<c02a0c7c>] (cfq_insert_request+0x0/0x360) from [<c02942cc>] (elv_insert+0x15c/0x244) [ 110.251836] [<c0294170>] (elv_insert+0x0/0x244) from [<c0294470>] (__elv_add_request+0xbc/0xc0) [ 110.260510] r7:00000010 r6:00000003 r5:df7ff360 r4:c33b4a40 [ 110.266147] [<c02943b4>] (__elv_add_request+0x0/0xc0) from [<c0296c50>] (__make_request+0x3cc/0x438) [ 110.275254] r6:df7ff360 r5:00000000 r4:c33b4a40 r3:00000000 [ 110.280891] [<c0296884>] (__make_request+0x0/0x438) from [<c02956e0>] (generic_make_request+0x334/0x39c) [ 110.290345] [<c02953ac>] (generic_make_request+0x0/0x39c) from [<c029580c>] (submit_bio+0xc4/0xe0) [ 110.299279] [<c0295748>] (submit_bio+0x0/0xe0) from [<c01ebaac>] (mpage_bio_submit+0x24/0x34) [ 110.307779] r8:00000004 r7:c3615880 r6:df043d68 r5:00000004 r4:d00b5e20 [ 110.314457] [<c01eba88>] (mpage_bio_submit+0x0/0x34) from [<c01ec83c>] (mpage_readpages+0x104/0x11c) [ 110.323564] [<c01ec738>] (mpage_readpages+0x0/0x11c) from [<bf002d04>] (LxReadPages+0x20/0x28 [rfs_glue]) [ 110.333104] [<bf002ce4>] (LxReadPages+0x0/0x28 [rfs_glue]) from [<c01a1774>] (__do_page_cache_readahead+0x13c/0x1f0) [ 110.343599] [<c01a1638>] (__do_page_cache_readahead+0x0/0x1f0) from [<c01a1894>] (do_page_cache_readahead+0x6c/0x74) [ 110.354093] [<c01a1828>] (do_page_cache_readahead+0x0/0x74) from [<c0199eec>] (filemap_fault+0x154/0x364) [ 110.363634] r7:c3c32964 r6:df043e30 r5:dafb9f00 r4:00000000 [ 110.369271] [<c0199d98>] (filemap_fault+0x0/0x364) from [<c01ac3a4>] (__do_fault+0x54/0x418) [ 110.377684] [<c01ac350>] (__do_fault+0x0/0x418) from [<c01ad7c8>] (handle_mm_fault+0x28c/0x630) [ 110.386357] [<c01ad53c>] (handle_mm_fault+0x0/0x630) from [<c013d95c>] (do_page_fault+0xf8/0x1e8) [ 110.395204] [<c013d864>] (do_page_fault+0x0/0x1e8) from [<c01352c4>] (do_DataAbort+0x3c/0xa0) [ 110.403704] [<c0135288>] (do_DataAbort+0x0/0xa0) from [<c0135ee4>] (ret_from_exception+0x0/0x10) [ 110.412464] Exception stack(0xdf043fb0 to 0xdf043ff8) [ 110.417494] 3fa0: 4230b820 00000000 4230bd24 00000000 [ 110.425733] 3fc0: 00000484 00000000 4230b820 4230b820 bec17f30 4230bd24 bec17f48 bec18094 [ 110.433972] 3fe0: 4230b8a0 bec17efc 410067cc 410184cc 20000010 ffffffff [ 110.442213] r7:4230b820 r6:4230b820 r5:00000000 r4:ffffffff [ 110.447850] Code: e1a01000 e59f000c eb0d15c5 e3a03000 (e5833000) [ 110.574108] ---[ end trace 2082a2012f359128 ]--- tid[ 118.038802] BUG: spinlock lockup on CPU#0, mmcqd/1284, c42e7200 [ 118.043248] [<c047f164>] (dump_stack+0x0/0x14) from [<c02adf30>] (_raw_spin_lock+0x12c/0x16c) [ 118.051745] [<c02ade04>] (_raw_spin_lock+0x0/0x16c) from [<c0481c24>] (_spin_lock_irq+0x14/0x18) [ 118.060505] r8:c33b4b7c r7:c33b4a40 r6:c42e721c r5:c42e7214 r4:c4594000 [ 118.067182] [<c0481c10>] (_spin_lock_irq+0x0/0x18) from [<c0370504>] (mmc_queue_thread+0x48/0xe8) [ 118.076029] [<c03704bc>] (mmc_queue_thread+0x0/0xe8) from [<c016ef04>] (kthread+0x54/0x80) [ 118.084269] [<c016eeb0>] (kthread+0x0/0x80) from [<c015d9a8>] (do_exit+0x0/0x640) [ 118.091728] r5:00000000 r4:00000000 > - Chris. > -- > Chris Ball <cjb@xxxxxxxxxx> > One Laptop Per Child > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
