Hi, I am having a crash with the latest 2.6.29 pm branch with CPU_FREQ enabled. It looks like clk_set_rate is called recursively, thus deadlocking on the mutex. Any idea why this worked fine on 2.6.29-rc8 pm? Here is the dump excerpt: ... Disabling unused clock "sys_clkout1" BUG: scheduling while atomic: swapper/1/0x00000002 Modules linked in: [<c0032f40>] (dump_stack+0x0/0x14) from [<c0055dcc>] (__schedule_bug+0x54/0x60) [<c0055d78>] (__schedule_bug+0x0/0x60) from [<c02e7be4>] (schedule+0x78/0x2bc) r4:c781c000 [<c02e7b6c>] (schedule+0x0/0x2bc) from [<c02e8b60>] (__mutex_lock_slowpath+0x174/0x290) [<c02e89ec>] (__mutex_lock_slowpath+0x0/0x290) from [<c02e8ca4>] (mutex_lock+0x28/0x30) [<c02e8c7c>] (mutex_lock+0x0/0x30) from [<c00413b4>] (clk_set_rate+0x2c/0xec) r4:c03ced20 [<c0041388>] (clk_set_rate+0x0/0xec) from [<c003fc94>] (omap3_select_table_rate+0xd0/0x168) r6:00000004 r5:c03fd474 r4:c03d426c [<c003fbc4>] (omap3_select_table_rate+0x0/0x168) from [<c0038d3c>] (omap2_clk_set_rate+0x20/0x24) r6:60000013 r5:20c85580 r4:c03ce41c [<c0038d1c>] (omap2_clk_set_rate+0x0/0x24) from [<c0041410>] (clk_set_rate+0x88/0xec) [<c0041388>] (clk_set_rate+0x0/0xec) from [<c0013518>] (omap_cpu_init+0xc8/0x108) r6:c03f4b20 r5:c03fddac r4:c7be9be0 [<c0013450>] (omap_cpu_init+0x0/0x108) from [<c022c3a0>] (cpufreq_add_dev+0x120/0x300) r5:c7be9be0 r4:00000000 [<c022c280>] (cpufreq_add_dev+0x0/0x300) from [<c01dc130>] (sysdev_driver_register+0xb4/0x124) r8:00000000 r7:00000000 r6:c03f4b20 r5:c03ef708 r4:c03fc95c [<c01dc07c>] (sysdev_driver_register+0x0/0x124) from [<c022c214>] (cpufreq_register_driver+0x98/0x104) r6:00000000 r5:c041efac r4:c03d541c [<c022c17c>] (cpufreq_register_driver+0x0/0x104) from [<c0013448>] (omap_cpufreq_init+0x14/0x1c) r5:c00266fc r4:c03fc080 [<c0013434>] (omap_cpufreq_init+0x0/0x1c) from [<c002e2ac>] (__exception_text_end+0x54/0x188) [<c002e258>] (__exception_text_end+0x0/0x188) from [<c0008768>] (kernel_init+0x74/0xdc) [<c00086f4>] (kernel_init+0x0/0xdc) from [<c005d568>] (do_exit+0x0/0x6b8) r5:00000000 r4:00000000 Regards, Jean On Wednesday 18 March 2009 06:21:09 Kevin Hilman wrote: > FYI... > > The PM branch has now been rebased to today's linux-omap HEAD which is > based on v2.6.29-rc8. The previous PM branch has been renamed to > pm-2.6.28. Depending on when you look, Tony's linux-omap tree may not > (yet) have the latest PM branch. If not, you can use my PM tree[1] > directly. Also, pm-2.6.28 will only be available on my tree. > > Tested on OMAP3 Beagle and RX51 and was able to hit RET and OFF in > suspend and in PM idle with minimal kernel. No testing yet done for > CPUidle or DVFS. Please test on your hardware and submit results to > the list. Thanks. > > Kevin > > -- > > Misc. conflicts/issues resolved after rebase: > > - no longer safe to use getnstimeofday() in suspend path since timekeeping > subsystem is also suspended in the suspend path. PM debug timing has > been converted to use sched_clock() which is 32k sync-timer based. > > - Update board-rx51.c to use common OMAP3 OPPs > > Known issues: > > - Beagle: MMC: off-mode needs work in MMC driver, so if you hit off > and have a rootfs on MMC, you're dead. > > - Beagle: MMC regulator: unbalanced disables. This happens on boot > and during suspend/resume. I don't think this is related to the PM > branch, but is probably in linux-omap HEAD also, but didn't test. > > Linux version 2.6.29-rc8-omap1-arm-omap3beagle-default-05653-gd803372-dirty > (khilman@vence) (gcc version 4.3.2 (Sourcery G++ Lite 2008q3-66) ) #4 > PREEMPT Tue Mar 17 21:38:09 PDT 2009 [...] > i2c_omap i2c_omap.1: bus 1 rev3.12 at 2600 kHz > twl4030: PIH (irq 7) chaining IRQs 368..375 > twl4030: power (irq 373) chaining IRQs 376..383 > twl4030: gpio (irq 368) chaining IRQs 384..401 > beagle_twl_gpio_setup:145 > twl4030_mmc_init:303 > twl4030_mmc_init:318 > regulator: VMMC1: 1850 <--> 3150 mV normal standby > regulator: VDAC: 1800 mV normal standby > regulator: VUSB1V5: 1500 <--> 0 mV normal standby > regulator: VUSB1V8: 1800 <--> 0 mV normal standby > regulator: VUSB3V1: 3100 <--> 0 mV normal standby > regulator: VSIM: 1800 <--> 3000 mV normal standby > [...] > mmci-omap-hs mmci-omap-hs.0: Failed to get debounce clock > ------------[ cut here ]------------ > WARNING: at > /net/home/khilman/work/kernel/omap/pm/drivers/regulator/core.c:1216 > regulator_disable+0x64/0x90() unbalanced disables for supply > mmci-omap-hs.0-vmmc > Modules linked in: > [<c02a0830>] (dump_stack+0x0/0x14) from [<c0053af0>] > (warn_slowpath+0x6c/0x88) [<c0053a84>] (warn_slowpath+0x0/0x88) from > [<c01b8bdc>] (regulator_disable+0x64/0x90) r3:c79dc2a0 r2:c03390cb > r7:c78e8c20 r6:c78aac38 r5:c78e8c20 r4:fffffffb > [<c01b8b78>] (regulator_disable+0x0/0x90) from [<c0209400>] > (mmc_regulator_set_ocr+0xb0/0xcc) r7:c78e8c20 r6:00000001 r5:00000000 > r4:00000000 > [<c0209350>] (mmc_regulator_set_ocr+0x0/0xcc) from [<c003abe8>] > (twl_mmc1_set_power+0xc0/0xec) r7:c784f538 r6:00000000 r5:00000000 > r4:c039185c > [<c003ab28>] (twl_mmc1_set_power+0x0/0xec) from [<c0210aa8>] > (omap_mmc_set_ios+0x54/0x2b0) r7:c784f538 r6:c784f5c0 r5:c784f400 > r4:c7844380 > [<c0210a54>] (omap_mmc_set_ios+0x0/0x2b0) from [<c0208dc8>] > (mmc_power_off+0x54/0x58) r7:c784f400 r6:c7910400 r5:00000000 r4:c784f400 > [<c0208d74>] (mmc_power_off+0x0/0x58) from [<c0209074>] > (mmc_start_host+0x14/0x24) [<c0209060>] (mmc_start_host+0x0/0x24) from > [<c020a2a0>] (mmc_add_host+0x58/0x64) r5:00000000 r4:c784f400 > [<c020a248>] (mmc_add_host+0x0/0x64) from [<c001ec00>] > (omap_mmc_probe+0x3d0/0x548) r5:c784f5c0 r4:00000000 > [<c001e830>] (omap_mmc_probe+0x0/0x548) from [<c01dd554>] > (platform_drv_probe+0x20/0x24) [<c01dd534>] (platform_drv_probe+0x0/0x24) > from [<c01dc740>] (driver_probe_device+0xd4/0x180) [<c01dc66c>] > (driver_probe_device+0x0/0x180) from [<c01dc854>] > (__driver_attach+0x68/0x8c) r7:c789d140 r6:c038ada4 r5:c7910490 r4:c7910408 > [<c01dc7ec>] (__driver_attach+0x0/0x8c) from [<c01dbf8c>] > (bus_for_each_dev+0x4c/0x80) r7:c789d140 r6:c038ada4 r5:c01dc7ec > r4:00000000 > [<c01dbf40>] (bus_for_each_dev+0x0/0x80) from [<c01dc584>] > (driver_attach+0x20/0x28) r6:c038ada4 r5:00000000 r4:00000000 > [<c01dc564>] (driver_attach+0x0/0x28) from [<c01db868>] > (bus_add_driver+0xa8/0x210) [<c01db7c0>] (bus_add_driver+0x0/0x210) from > [<c01dca78>] (driver_register+0x98/0x120) r8:00000001 r7:c001e814 > r6:c038ada4 r5:00000000 r4:c0024a44 > [<c01dc9e0>] (driver_register+0x0/0x120) from [<c01dd9fc>] > (platform_driver_register+0x6c/0x88) r9:00000000 r8:00000001 r7:c001e814 > r6:00000000 r5:00000000 > r4:c0024a44 > [<c01dd990>] (platform_driver_register+0x0/0x88) from [<c001e828>] > (omap_mmc_init+0x14/0x1c) [<c001e814>] (omap_mmc_init+0x0/0x1c) from > [<c00292ec>] (do_one_initcall+0x5c/0x19c) [<c0029290>] > (do_one_initcall+0x0/0x19c) from [<c0008404>] (kernel_init+0x84/0xf8) > r8:00000000 r7:00000000 r6:00000000 r5:00000000 r4:c0024a44 > [<c0008380>] (kernel_init+0x0/0xf8) from [<c0056ea0>] (do_exit+0x0/0x764) > r4:00000000 > ---[ end trace e339700732a37a4d ]--- > [.../ > (none):~# echo 1 > /sys/power/clocks_off_while_idle > (none):~# echo mem > /sys/power/state > PM: Syncing filesystems ... done. > Freezing user space processes ... (elapsed 0.00 seconds) done. > Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done. > Suspending console(s) (use no_console_suspend to debug) > ------------[ cut here ]------------ > WARNING: at > /net/home/khilman/work/kernel/omap/pm/drivers/regulator/core.c:1216 > regulator_disable+0x64/0x90() unbalanced disables for supply > mmci-omap-hs.0-vmmc > Modules linked in: > [<c02a0830>] (dump_stack+0x0/0x14) from [<c0053af0>] > (warn_slowpath+0x6c/0x88) [<c0053a84>] (warn_slowpath+0x0/0x88) from > [<c01b8bdc>] (regulator_disable+0x64/0x90) r3:c79dc2a0 r2:c03390cb > r7:c78e8c20 r6:c78aac38 r5:c78e8c20 r4:fffffffb > [<c01b8b78>] (regulator_disable+0x0/0x90) from [<c0209400>] > (mmc_regulator_set_ocr+0xb0/0xcc) r7:c78e8c20 r6:00000001 r5:00000000 > r4:00000000 > [<c0209350>] (mmc_regulator_set_ocr+0x0/0xcc) from [<c003abe8>] > (twl_mmc1_set_power+0xc0/0xec) r7:c784f538 r6:00000000 r5:00000000 > r4:c039185c > [<c003ab28>] (twl_mmc1_set_power+0x0/0xec) from [<c0210aa8>] > (omap_mmc_set_ios+0x54/0x2b0) r7:c784f538 r6:c784f5c0 r5:c784f400 > r4:c7844380 > [<c0210a54>] (omap_mmc_set_ios+0x0/0x2b0) from [<c0208dc8>] > (mmc_power_off+0x54/0x58) r7:c7910490 r6:c7910400 r5:a0000013 r4:c784f400 > [<c0208d74>] (mmc_power_off+0x0/0x58) from [<c02097e0>] > (mmc_suspend_host+0x14c/0x154) [<c0209694>] (mmc_suspend_host+0x0/0x154) > from [<c02107e0>] (omap_mmc_suspend+0x30/0xe0) r5:c0388a74 r4:c784f5c0 > [<c02107b0>] (omap_mmc_suspend+0x0/0xe0) from [<c01dd5d4>] > (platform_drv_suspend+0x20/0x24) r7:c7910490 r6:c79104b8 r5:c0388a74 > r4:c0388ba4 > [<c01dd5b4>] (platform_drv_suspend+0x0/0x24) from [<c01dd6c4>] > (platform_pm_suspend+0x50/0x5c) [<c01dd674>] (platform_pm_suspend+0x0/0x5c) > from [<c01df9ec>] (pm_op+0x38/0x7c) [<c01df9b4>] (pm_op+0x0/0x7c) from > [<c01e0150>] (device_suspend+0x350/0x480) r5:c7910408 r4:c0388ba4 > [<c01dfe00>] (device_suspend+0x0/0x480) from [<c007d4b8>] > (suspend_devices_and_enter+0x44/0x1c4) [<c007d474>] > (suspend_devices_and_enter+0x0/0x1c4) from [<c007d7a0>] > (enter_state+0x134/0x1b8) r7:c02a5bf4 r6:00000003 r5:c031de6b r4:000072ab > [<c007d66c>] (enter_state+0x0/0x1b8) from [<c007d8c0>] > (state_store+0x9c/0xc4) r7:c02a5bf4 r6:00000003 r5:00000003 r4:c031de6b > [<c007d824>] (state_store+0x0/0xc4) from [<c019329c>] > (kobj_attr_store+0x20/0x24) [<c019327c>] (kobj_attr_store+0x0/0x24) from > [<c00f7010>] (sysfs_write_file+0x110/0x144) [<c00f6f00>] > (sysfs_write_file+0x0/0x144) from [<c00ac7b4>] (vfs_write+0xb8/0x148) > [<c00ac6fc>] (vfs_write+0x0/0x148) from [<c00ac908>] (sys_write+0x44/0x70) > r7:00000004 r6:c78d3ae0 r5:00000000 r4:00000000 > [<c00ac8c4>] (sys_write+0x0/0x70) from [<c0029e20>] > (ret_fast_syscall+0x0/0x2c) r8:c0029fc8 r7:00000004 r6:401ab5e0 r5:000c3408 > r4:00000004 > ---[ end trace e339700732a37a4f ]--- > Successfully put all powerdomains to target state > Restarting tasks ... done. > > [1] > http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-pm.git;a=summa >ry -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
