Hi ! I use 2.6.21.5-rt20 on armv4t . When I mount a sd-card on a usb-sd-card reader and scp a file to the sd-card i get a bug on Voluntary Kernel Preemption. Does someone have an idea ? On: 2.6.21.5-rt20 No Forced Preemption (Server) --> No problem 2.6.21.5-rt20 Complete Preemption (Real-Time) --> No Problem 2.6.22 linus tree With Preemptible Kernel (EXPERIMENTAL) --> No Problem 2.6.22 linus tree Without Preemptible Kernel (EXPERIMENTAL) --> No Problem With Voluntary Kernel Preemption 2.6.21.5-rt20 (Desktop) i get: [root@micro9]\# mount /dev/sdd1 /mnt then scp a 15 MB file [root@micro9]\# BUG: at kernel/sched.c:5030 cond_resched_softirq() [<c0025628>] (dump_stack+0x0/0x28) from [<c025d1c0>] (cond_resched_softirq+0x60/0xb8) [<c025d160>] (cond_resched_softirq+0x0/0xb8) from [<c01b5090>] (release_sock+0x64/0xb4) r4 = C18C4458 [<c01b502c>] (release_sock+0x0/0xb4) from [<c01e1040>] (tcp_sendmsg+0xad0/0xbf4) r7 = C15B6504 r6 = 00000030 r5 = C1BF4048 r4 = C1A97CD0 [<c01e0570>] (tcp_sendmsg+0x0/0xbf4) from [<c01fd5f0>] (inet_sendmsg+0x60/0x68) [<c01fd590>] (inet_sendmsg+0x0/0x68) from [<c01b24e0>] (sock_aio_write+0xec/0xf4) r7 = C1CB5F28 r6 = C1B5C7CC r5 = 00000030 r4 = C1CB5E98 [<c01b23f4>] (sock_aio_write+0x0/0xf4) from [<c0091d84>] (do_sync_write+0xc0/0x114) r8 = C0020E28 r7 = C1CB5F78 r6 = C1CB5F78 r5 = C1B5C7CC r4 = C1CB5E98 [<c0091cc4>] (do_sync_write+0x0/0x114) from [<c00926c8>] (vfs_write+0xd8/0x140) r6 = 00000030 r5 = 0005ADB8 r4 = C1B5C7CC [<c00925f0>] (vfs_write+0x0/0x140) from [<c0092cd0>] (sys_write+0x50/0x80) r7 = 00000004 r6 = 00000000 r5 = 00000000 r4 = C1B5C7CC [<c0092c80>] (sys_write+0x0/0x80) from [<c0020c80>] (ret_fast_syscall+0x0/0x2c) r6 = 00052E34 r5 = 00000030 r4 = 00000003 -- thanks regards Manfred Gruber - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
