Re: RCU warning during UBI file system mount
On Tue, Sep 04, 2012 at 08:43:12AM -0700, Subodh Nijsure wrote: > MX28 is ARM device. I removed following from my config and these > warnings went away. > > CONFIG_CPU_IDLE=y > CONFIG_CPU_IDLE_GOV_LADDER=y > CONFIG_CPU_IDLE_GOV_MENU=y > There is no cpuidle implemented on imx28. I do not understand how these options influence the result here. > I have attached the kernel configuration file I used. > > It doesn't affect specific hw I am working with as device is not > required to enter idle mode. > I am Cc-ing linux-arm folks, in case someone on arm platform > requires CPU idele &, RCU to work. > I just ran a case with CONFIG_CPU_IDLE and RCU support and failed to reproduce the warning. Is this something specific to gpmi-nand or we can see it with any other imx28 drivers/cases? Sorry, I do not have NAND flash set up on my imx28 board. -- Regards, Shawn -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: RCU warning during UBI file system mount
On Tue, Sep 04, 2012 at 10:46:36AM +0300, Artem Bityutskiy wrote: > Let's CC LKML and Paul. > > > On Sat, 2012-09-01 at 22:19 -0700, Subodh Nijsure wrote: > > Hello, > > > > I am running 3.6-rc4 kernel on my MX28 based board and every time I > > mount UBI file system I see following warning. > > Anybody else seen this errors, particularly those running it on MXS > > platform? > > > > I haven't debugged RCU warnings before any clues as to what is the > > source of this warning is, should I be looking at > > start_dma_without_bch_irq() code? Would appreciate any pointers in > > fixing this... RCU is upset because what it believes to be a non-idle task is telling RCU that it is entering the idle loop. Does the MX28 kernel have any unusual idle features? (This is a subarch of ARM, correct?) Thanx, Paul > > [4.28] WARNING: at /opt/git/kernel-mainline/kernel/rcutiny.c:75 > > rcu_idle_enter_common.clone.7+0x90/0xac() > > [4.28] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper > > [4.28] Modules linked in: > > [4.28] [] (unwind_backtrace+0x0/0x130) from > > [] (warn_slowpath_common+0x4c/0x64) > > [4.28] [] (warn_slowpath_common+0x4c/0x64) from > > [] (warn_slowpath_fmt+0x30/0x40) > > [4.28] [] (warn_slowpath_fmt+0x30/0x40) from > > [] (rcu_idle_enter_common.clone.7+0x90/0xac) > > [4.28] [] (rcu_idle_enter_common.clone.7+0x90/0xac) > > from [] (rcu_irq_exit+0x3c/0x78) > > [4.28] [] (rcu_irq_exit+0x3c/0x78) from [] > > (handle_IRQ+0x34/0x84) > > [4.28] [] (handle_IRQ+0x34/0x84) from [] > > (__irq_svc+0x34/0x58) > > [4.28] [] (__irq_svc+0x34/0x58) from [] > > (schedule_timeout+0xdc/0x16c) > > [4.28] [] (schedule_timeout+0xdc/0x16c) from > > [] (wait_for_common+0xb4/0x160) > > [4.28] [] (wait_for_common+0xb4/0x160) from > > [] (start_dma_without_bch_irq+0x6c/0xa8) > > [4.28] [] (start_dma_without_bch_irq+0x6c/0xa8) from > > [] (gpmi_send_command+0x120/0x154) > > [4.28] [] (gpmi_send_command+0x120/0x154) from > > [] (gpmi_cmd_ctrl+0x44/0x6c) > > [4.28] [] (gpmi_cmd_ctrl+0x44/0x6c) from [] > > (nand_command_lp+0xe8/0x270) > > [4.28] [] (nand_command_lp+0xe8/0x270) from > > [] (nand_do_read_ops+0x124/0x444) > > [4.28] [] (nand_do_read_ops+0x124/0x444) from > > [] (nand_read+0x54/0x78) > > [4.28] [] (nand_read+0x54/0x78) from [] > > (part_read+0x48/0x80) > > [4.28] [] (part_read+0x48/0x80) from [] > > (mtd_read+0x88/0xb4) > > [4.28] [] (mtd_read+0x88/0xb4) from [] > > (ubi_io_read+0xb0/0x3e8) > > [4.28] [] (ubi_io_read+0xb0/0x3e8) from [] > > (ubi_eba_read_leb+0x198/0x4bc) > > [4.28] [] (ubi_eba_read_leb+0x198/0x4bc) from > > [] (ubi_leb_read+0xf4/0x16c) > > [4.28] [] (ubi_leb_read+0xf4/0x16c) from [] > > (ubifs_leb_read+0x24/0x88) > > [4.28] [] (ubifs_leb_read+0x24/0x88) from [] > > (ubifs_read_node+0xa8/0x2e4) > > [4.28] [] (ubifs_read_node+0xa8/0x2e4) from > > [] (ubifs_read_sb_node+0x54/0x78) > > [4.28] [] (ubifs_read_sb_node+0x54/0x78) from > > [] (ubifs_read_superblock+0xc8c/0x133c) > > [4.28] [] (ubifs_read_superblock+0xc8c/0x133c) from > > [] (ubifs_mount+0x73c/0x1bc0) > > [4.28] [] (ubifs_mount+0x73c/0x1bc0) from [] > > (mount_fs+0x44/0x184) > > [4.28] [] (mount_fs+0x44/0x184) from [] > > (vfs_kern_mount+0x4c/0xc0) > > [4.28] [] (vfs_kern_mount+0x4c/0xc0) from [] > > (do_kern_mount+0x34/0xd0) > > [4.28] [] (do_kern_mount+0x34/0xd0) from [] > > (do_mount+0x15c/0x73c) > > [4.28] [] (do_mount+0x15c/0x73c) from [] > > (sys_mount+0x84/0xc4) > > [4.28] [] (sys_mount+0x84/0xc4) from [] > > (do_mount_root+0x24/0xb0) > > [4.28] [] (do_mount_root+0x24/0xb0) from [] > > (mount_block_root+0xe8/0x214) > > [4.28] [] (mount_block_root+0xe8/0x214) from > > [] (prepare_namespace+0x8c/0x180) > > [4.28] [] (prepare_namespace+0x8c/0x180) from > > [] (kernel_init+0x16c/0x1b4) > > [4.28] [] (kernel_init+0x16c/0x1b4) from [] > > (kernel_thread_exit+0x0/0x8) > > [4.28] ---[ end trace 4d36b722759fdc4f ]--- > > [4.95] UBIFS DBG (pid 58): ubifs_bg_thread: background thread > > "ubifs_bgt0_0" started, PID 58 > > > > -Subodh > > > > __ > > Linux MTD discussion mailing list > > http://lists.infradead.org/mailman/listinfo/linux-mtd/ > > -- > Best Regards, > Artem Bityutskiy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: RCU warning during UBI file system mount
Let's CC LKML and Paul. On Sat, 2012-09-01 at 22:19 -0700, Subodh Nijsure wrote: > Hello, > > I am running 3.6-rc4 kernel on my MX28 based board and every time I > mount UBI file system I see following warning. > Anybody else seen this errors, particularly those running it on MXS > platform? > > I haven't debugged RCU warnings before any clues as to what is the > source of this warning is, should I be looking at > start_dma_without_bch_irq() code? Would appreciate any pointers in > fixing this... > > [4.28] WARNING: at /opt/git/kernel-mainline/kernel/rcutiny.c:75 > rcu_idle_enter_common.clone.7+0x90/0xac() > [4.28] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper > [4.28] Modules linked in: > [4.28] [] (unwind_backtrace+0x0/0x130) from > [] (warn_slowpath_common+0x4c/0x64) > [4.28] [] (warn_slowpath_common+0x4c/0x64) from > [] (warn_slowpath_fmt+0x30/0x40) > [4.28] [] (warn_slowpath_fmt+0x30/0x40) from > [] (rcu_idle_enter_common.clone.7+0x90/0xac) > [4.28] [] (rcu_idle_enter_common.clone.7+0x90/0xac) > from [] (rcu_irq_exit+0x3c/0x78) > [4.28] [] (rcu_irq_exit+0x3c/0x78) from [] > (handle_IRQ+0x34/0x84) > [4.28] [] (handle_IRQ+0x34/0x84) from [] > (__irq_svc+0x34/0x58) > [4.28] [] (__irq_svc+0x34/0x58) from [] > (schedule_timeout+0xdc/0x16c) > [4.28] [] (schedule_timeout+0xdc/0x16c) from > [] (wait_for_common+0xb4/0x160) > [4.28] [] (wait_for_common+0xb4/0x160) from > [] (start_dma_without_bch_irq+0x6c/0xa8) > [4.28] [] (start_dma_without_bch_irq+0x6c/0xa8) from > [] (gpmi_send_command+0x120/0x154) > [4.28] [] (gpmi_send_command+0x120/0x154) from > [] (gpmi_cmd_ctrl+0x44/0x6c) > [4.28] [] (gpmi_cmd_ctrl+0x44/0x6c) from [] > (nand_command_lp+0xe8/0x270) > [4.28] [] (nand_command_lp+0xe8/0x270) from > [] (nand_do_read_ops+0x124/0x444) > [4.28] [] (nand_do_read_ops+0x124/0x444) from > [] (nand_read+0x54/0x78) > [4.28] [] (nand_read+0x54/0x78) from [] > (part_read+0x48/0x80) > [4.28] [] (part_read+0x48/0x80) from [] > (mtd_read+0x88/0xb4) > [4.28] [] (mtd_read+0x88/0xb4) from [] > (ubi_io_read+0xb0/0x3e8) > [4.28] [] (ubi_io_read+0xb0/0x3e8) from [] > (ubi_eba_read_leb+0x198/0x4bc) > [4.28] [] (ubi_eba_read_leb+0x198/0x4bc) from > [] (ubi_leb_read+0xf4/0x16c) > [4.28] [] (ubi_leb_read+0xf4/0x16c) from [] > (ubifs_leb_read+0x24/0x88) > [4.28] [] (ubifs_leb_read+0x24/0x88) from [] > (ubifs_read_node+0xa8/0x2e4) > [4.28] [] (ubifs_read_node+0xa8/0x2e4) from > [] (ubifs_read_sb_node+0x54/0x78) > [4.28] [] (ubifs_read_sb_node+0x54/0x78) from > [] (ubifs_read_superblock+0xc8c/0x133c) > [4.28] [] (ubifs_read_superblock+0xc8c/0x133c) from > [] (ubifs_mount+0x73c/0x1bc0) > [4.28] [] (ubifs_mount+0x73c/0x1bc0) from [] > (mount_fs+0x44/0x184) > [4.28] [] (mount_fs+0x44/0x184) from [] > (vfs_kern_mount+0x4c/0xc0) > [4.28] [] (vfs_kern_mount+0x4c/0xc0) from [] > (do_kern_mount+0x34/0xd0) > [4.28] [] (do_kern_mount+0x34/0xd0) from [] > (do_mount+0x15c/0x73c) > [4.28] [] (do_mount+0x15c/0x73c) from [] > (sys_mount+0x84/0xc4) > [4.28] [] (sys_mount+0x84/0xc4) from [] > (do_mount_root+0x24/0xb0) > [4.28] [] (do_mount_root+0x24/0xb0) from [] > (mount_block_root+0xe8/0x214) > [4.28] [] (mount_block_root+0xe8/0x214) from > [] (prepare_namespace+0x8c/0x180) > [4.28] [] (prepare_namespace+0x8c/0x180) from > [] (kernel_init+0x16c/0x1b4) > [4.28] [] (kernel_init+0x16c/0x1b4) from [] > (kernel_thread_exit+0x0/0x8) > [4.28] ---[ end trace 4d36b722759fdc4f ]--- > [4.95] UBIFS DBG (pid 58): ubifs_bg_thread: background thread > "ubifs_bgt0_0" started, PID 58 > > -Subodh > > __ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/ -- Best Regards, Artem Bityutskiy signature.asc Description: This is a digitally signed message part
Re: RCU warning during UBI file system mount
Let's CC LKML and Paul. On Sat, 2012-09-01 at 22:19 -0700, Subodh Nijsure wrote: Hello, I am running 3.6-rc4 kernel on my MX28 based board and every time I mount UBI file system I see following warning. Anybody else seen this errors, particularly those running it on MXS platform? I haven't debugged RCU warnings before any clues as to what is the source of this warning is, should I be looking at start_dma_without_bch_irq() code? Would appreciate any pointers in fixing this... [4.28] WARNING: at /opt/git/kernel-mainline/kernel/rcutiny.c:75 rcu_idle_enter_common.clone.7+0x90/0xac() [4.28] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper [4.28] Modules linked in: [4.28] [c0014eec] (unwind_backtrace+0x0/0x130) from [c001dd94] (warn_slowpath_common+0x4c/0x64) [4.28] [c001dd94] (warn_slowpath_common+0x4c/0x64) from [c001de40] (warn_slowpath_fmt+0x30/0x40) [4.28] [c001de40] (warn_slowpath_fmt+0x30/0x40) from [c0061618] (rcu_idle_enter_common.clone.7+0x90/0xac) [4.28] [c0061618] (rcu_idle_enter_common.clone.7+0x90/0xac) from [c0061670] (rcu_irq_exit+0x3c/0x78) [4.28] [c0061670] (rcu_irq_exit+0x3c/0x78) from [c000fe90] (handle_IRQ+0x34/0x84) [4.28] [c000fe90] (handle_IRQ+0x34/0x84) from [c000ec34] (__irq_svc+0x34/0x58) [4.28] [c000ec34] (__irq_svc+0x34/0x58) from [c0394c4c] (schedule_timeout+0xdc/0x16c) [4.28] [c0394c4c] (schedule_timeout+0xdc/0x16c) from [c0395f34] (wait_for_common+0xb4/0x160) [4.28] [c0395f34] (wait_for_common+0xb4/0x160) from [c02579d0] (start_dma_without_bch_irq+0x6c/0xa8) [4.28] [c02579d0] (start_dma_without_bch_irq+0x6c/0xa8) from [c0258660] (gpmi_send_command+0x120/0x154) [4.28] [c0258660] (gpmi_send_command+0x120/0x154) from [c0256fb4] (gpmi_cmd_ctrl+0x44/0x6c) [4.28] [c0256fb4] (gpmi_cmd_ctrl+0x44/0x6c) from [c024f8e0] (nand_command_lp+0xe8/0x270) [4.28] [c024f8e0] (nand_command_lp+0xe8/0x270) from [c0251e00] (nand_do_read_ops+0x124/0x444) [4.28] [c0251e00] (nand_do_read_ops+0x124/0x444) from [c0252558] (nand_read+0x54/0x78) [4.28] [c0252558] (nand_read+0x54/0x78) from [c02499a4] (part_read+0x48/0x80) [4.28] [c02499a4] (part_read+0x48/0x80) from [c0246910] (mtd_read+0x88/0xb4) [4.28] [c0246910] (mtd_read+0x88/0xb4) from [c026b188] (ubi_io_read+0xb0/0x3e8) [4.28] [c026b188] (ubi_io_read+0xb0/0x3e8) from [c026740c] (ubi_eba_read_leb+0x198/0x4bc) [4.28] [c026740c] (ubi_eba_read_leb+0x198/0x4bc) from [c0266800] (ubi_leb_read+0xf4/0x16c) [4.28] [c0266800] (ubi_leb_read+0xf4/0x16c) from [c010] (ubifs_leb_read+0x24/0x88) [4.28] [c010] (ubifs_leb_read+0x24/0x88) from [c01572f8] (ubifs_read_node+0xa8/0x2e4) [4.28] [c01572f8] (ubifs_read_node+0xa8/0x2e4) from [c0153c50] (ubifs_read_sb_node+0x54/0x78) [4.28] [c0153c50] (ubifs_read_sb_node+0x54/0x78) from [c0154940] (ubifs_read_superblock+0xc8c/0x133c) [4.28] [c0154940] (ubifs_read_superblock+0xc8c/0x133c) from [c01520ac] (ubifs_mount+0x73c/0x1bc0) [4.28] [c01520ac] (ubifs_mount+0x73c/0x1bc0) from [c00a49ec] (mount_fs+0x44/0x184) [4.28] [c00a49ec] (mount_fs+0x44/0x184) from [c00baf90] (vfs_kern_mount+0x4c/0xc0) [4.28] [c00baf90] (vfs_kern_mount+0x4c/0xc0) from [c00bb1a0] (do_kern_mount+0x34/0xd0) [4.28] [c00bb1a0] (do_kern_mount+0x34/0xd0) from [c00bc93c] (do_mount+0x15c/0x73c) [4.28] [c00bc93c] (do_mount+0x15c/0x73c) from [c00bcfa0] (sys_mount+0x84/0xc4) [4.28] [c00bcfa0] (sys_mount+0x84/0xc4) from [c04e4a04] (do_mount_root+0x24/0xb0) [4.28] [c04e4a04] (do_mount_root+0x24/0xb0) from [c04e4b78] (mount_block_root+0xe8/0x214) [4.28] [c04e4b78] (mount_block_root+0xe8/0x214) from [c04e4e28] (prepare_namespace+0x8c/0x180) [4.28] [c04e4e28] (prepare_namespace+0x8c/0x180) from [c04e4894] (kernel_init+0x16c/0x1b4) [4.28] [c04e4894] (kernel_init+0x16c/0x1b4) from [c000ff70] (kernel_thread_exit+0x0/0x8) [4.28] ---[ end trace 4d36b722759fdc4f ]--- [4.95] UBIFS DBG (pid 58): ubifs_bg_thread: background thread ubifs_bgt0_0 started, PID 58 -Subodh __ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/ -- Best Regards, Artem Bityutskiy signature.asc Description: This is a digitally signed message part
Re: RCU warning during UBI file system mount
On Tue, Sep 04, 2012 at 10:46:36AM +0300, Artem Bityutskiy wrote: Let's CC LKML and Paul. On Sat, 2012-09-01 at 22:19 -0700, Subodh Nijsure wrote: Hello, I am running 3.6-rc4 kernel on my MX28 based board and every time I mount UBI file system I see following warning. Anybody else seen this errors, particularly those running it on MXS platform? I haven't debugged RCU warnings before any clues as to what is the source of this warning is, should I be looking at start_dma_without_bch_irq() code? Would appreciate any pointers in fixing this... RCU is upset because what it believes to be a non-idle task is telling RCU that it is entering the idle loop. Does the MX28 kernel have any unusual idle features? (This is a subarch of ARM, correct?) Thanx, Paul [4.28] WARNING: at /opt/git/kernel-mainline/kernel/rcutiny.c:75 rcu_idle_enter_common.clone.7+0x90/0xac() [4.28] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper [4.28] Modules linked in: [4.28] [c0014eec] (unwind_backtrace+0x0/0x130) from [c001dd94] (warn_slowpath_common+0x4c/0x64) [4.28] [c001dd94] (warn_slowpath_common+0x4c/0x64) from [c001de40] (warn_slowpath_fmt+0x30/0x40) [4.28] [c001de40] (warn_slowpath_fmt+0x30/0x40) from [c0061618] (rcu_idle_enter_common.clone.7+0x90/0xac) [4.28] [c0061618] (rcu_idle_enter_common.clone.7+0x90/0xac) from [c0061670] (rcu_irq_exit+0x3c/0x78) [4.28] [c0061670] (rcu_irq_exit+0x3c/0x78) from [c000fe90] (handle_IRQ+0x34/0x84) [4.28] [c000fe90] (handle_IRQ+0x34/0x84) from [c000ec34] (__irq_svc+0x34/0x58) [4.28] [c000ec34] (__irq_svc+0x34/0x58) from [c0394c4c] (schedule_timeout+0xdc/0x16c) [4.28] [c0394c4c] (schedule_timeout+0xdc/0x16c) from [c0395f34] (wait_for_common+0xb4/0x160) [4.28] [c0395f34] (wait_for_common+0xb4/0x160) from [c02579d0] (start_dma_without_bch_irq+0x6c/0xa8) [4.28] [c02579d0] (start_dma_without_bch_irq+0x6c/0xa8) from [c0258660] (gpmi_send_command+0x120/0x154) [4.28] [c0258660] (gpmi_send_command+0x120/0x154) from [c0256fb4] (gpmi_cmd_ctrl+0x44/0x6c) [4.28] [c0256fb4] (gpmi_cmd_ctrl+0x44/0x6c) from [c024f8e0] (nand_command_lp+0xe8/0x270) [4.28] [c024f8e0] (nand_command_lp+0xe8/0x270) from [c0251e00] (nand_do_read_ops+0x124/0x444) [4.28] [c0251e00] (nand_do_read_ops+0x124/0x444) from [c0252558] (nand_read+0x54/0x78) [4.28] [c0252558] (nand_read+0x54/0x78) from [c02499a4] (part_read+0x48/0x80) [4.28] [c02499a4] (part_read+0x48/0x80) from [c0246910] (mtd_read+0x88/0xb4) [4.28] [c0246910] (mtd_read+0x88/0xb4) from [c026b188] (ubi_io_read+0xb0/0x3e8) [4.28] [c026b188] (ubi_io_read+0xb0/0x3e8) from [c026740c] (ubi_eba_read_leb+0x198/0x4bc) [4.28] [c026740c] (ubi_eba_read_leb+0x198/0x4bc) from [c0266800] (ubi_leb_read+0xf4/0x16c) [4.28] [c0266800] (ubi_leb_read+0xf4/0x16c) from [c010] (ubifs_leb_read+0x24/0x88) [4.28] [c010] (ubifs_leb_read+0x24/0x88) from [c01572f8] (ubifs_read_node+0xa8/0x2e4) [4.28] [c01572f8] (ubifs_read_node+0xa8/0x2e4) from [c0153c50] (ubifs_read_sb_node+0x54/0x78) [4.28] [c0153c50] (ubifs_read_sb_node+0x54/0x78) from [c0154940] (ubifs_read_superblock+0xc8c/0x133c) [4.28] [c0154940] (ubifs_read_superblock+0xc8c/0x133c) from [c01520ac] (ubifs_mount+0x73c/0x1bc0) [4.28] [c01520ac] (ubifs_mount+0x73c/0x1bc0) from [c00a49ec] (mount_fs+0x44/0x184) [4.28] [c00a49ec] (mount_fs+0x44/0x184) from [c00baf90] (vfs_kern_mount+0x4c/0xc0) [4.28] [c00baf90] (vfs_kern_mount+0x4c/0xc0) from [c00bb1a0] (do_kern_mount+0x34/0xd0) [4.28] [c00bb1a0] (do_kern_mount+0x34/0xd0) from [c00bc93c] (do_mount+0x15c/0x73c) [4.28] [c00bc93c] (do_mount+0x15c/0x73c) from [c00bcfa0] (sys_mount+0x84/0xc4) [4.28] [c00bcfa0] (sys_mount+0x84/0xc4) from [c04e4a04] (do_mount_root+0x24/0xb0) [4.28] [c04e4a04] (do_mount_root+0x24/0xb0) from [c04e4b78] (mount_block_root+0xe8/0x214) [4.28] [c04e4b78] (mount_block_root+0xe8/0x214) from [c04e4e28] (prepare_namespace+0x8c/0x180) [4.28] [c04e4e28] (prepare_namespace+0x8c/0x180) from [c04e4894] (kernel_init+0x16c/0x1b4) [4.28] [c04e4894] (kernel_init+0x16c/0x1b4) from [c000ff70] (kernel_thread_exit+0x0/0x8) [4.28] ---[ end trace 4d36b722759fdc4f ]--- [4.95] UBIFS DBG (pid 58): ubifs_bg_thread: background thread ubifs_bgt0_0 started, PID 58 -Subodh __ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/ -- Best Regards, Artem Bityutskiy -- To unsubscribe from this list: send the line
Re: RCU warning during UBI file system mount
On Tue, Sep 04, 2012 at 08:43:12AM -0700, Subodh Nijsure wrote: MX28 is ARM device. I removed following from my config and these warnings went away. CONFIG_CPU_IDLE=y CONFIG_CPU_IDLE_GOV_LADDER=y CONFIG_CPU_IDLE_GOV_MENU=y There is no cpuidle implemented on imx28. I do not understand how these options influence the result here. I have attached the kernel configuration file I used. It doesn't affect specific hw I am working with as device is not required to enter idle mode. I am Cc-ing linux-arm folks, in case someone on arm platform requires CPU idele , RCU to work. I just ran a case with CONFIG_CPU_IDLE and RCU support and failed to reproduce the warning. Is this something specific to gpmi-nand or we can see it with any other imx28 drivers/cases? Sorry, I do not have NAND flash set up on my imx28 board. -- Regards, Shawn -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
