From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx2.suse.de", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id 718EB679E6 for ; Tue, 25 Apr 2006 03:32:53 +1000 (EST) Received: from Relay1.suse.de (mail2.suse.de [195.135.221.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx2.suse.de (Postfix) with ESMTP id 2E6D31D921 for ; Mon, 24 Apr 2006 19:32:47 +0200 (CEST) Date: Mon, 24 Apr 2006 19:32:46 +0200 From: Olaf Hering To: linuxppc-dev@ozlabs.org Subject: alignment exceptionhandler sleeps in invalid context Message-ID: <20060424173246.GA22318@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I'm not sure where the bug is. Does it mean the network stack does something nasty, or is the exception handler itself broken? (probably the latter) This is 2.6.16.9 on a p270. <3>Debug: sleeping function called from invalid context at arch/powerpc/kernel/align.c:440 <4>in_atomic():1, irqs_disabled():0 <4>Call Trace: <4>[C00000000FFE6D10] [C00000000000EE20] .show_stack+0x68/0x1b0 (unreliable) <4>[C00000000FFE6DB0] [C000000000054248] .__might_sleep+0xd8/0xf4 <4>[C00000000FFE6E30] [C00000000000C490] .fix_alignment+0x50c/0x9c8 <4>[C00000000FFE6F10] [C000000000024E20] .alignment_exception+0x18/0xc8 <4>[C00000000FFE6F90] [C00000000000430C] alignment_common+0x10c/0x180 <4>--- Exception: 600 at .csum_partial+0x34/0x9c <4> LR = .skb_checksum+0x194/0x35c <4>[C00000000FFE7280] [D00000000033F3D0] 0xd00000000033f3d0 (unreliable) <4>[C00000000FFE7340] [C0000000002EB558] .skb_checksum_help+0x98/0x124 <4>[C00000000FFE73D0] [D000000000330748] .ip_nat_fn+0x84/0x278 [iptable_nat] <4>[C00000000FFE7490] [D000000000330C34] .ip_nat_local_fn+0x40/0xec [iptable_nat] <4>[C00000000FFE7520] [C00000000030DAE0] .nf_iterate+0x80/0x11c <4>[C00000000FFE75E0] [C00000000030DEC8] .nf_hook_slow+0x8c/0x17c <4>[C00000000FFE76B0] [C00000000031D2B0] .ip_queue_xmit+0x4bc/0x5d0 <4>[C00000000FFE7800] [C00000000032FBA0] .tcp_transmit_skb+0x7d8/0x844 <4>[C00000000FFE78B0] [C0000000003318F0] .__tcp_push_pending_frames+0x2d4/0x3fc <4>[C00000000FFE7970] [C00000000032EAD4] .tcp_rcv_established+0x894/0x964 <4>[C00000000FFE7A20] [C0000000003355C8] .tcp_v4_do_rcv+0x5c/0x48c <4>[C00000000FFE7AF0] [C000000000338A48] .tcp_v4_rcv+0xc78/0xcfc <4>[C00000000FFE7BC0] [C000000000316310] .ip_local_deliver+0x208/0x36c <4>[C00000000FFE7C50] [C000000000316024] .ip_rcv+0x600/0x6e4 <4>[C00000000FFE7CF0] [C0000000002EBB34] .netif_receive_skb+0x500/0x598 <4>[C00000000FFE7D90] [C0000000002EE37C] .process_backlog+0xcc/0x1c8 <4>[C00000000FFE7E40] [C0000000002EE55C] .net_rx_action+0xe4/0x230 <4>[C00000000FFE7EF0] [C000000000066524] .__do_softirq+0x98/0x164 <4>[C00000000FFE7F90] [C000000000025854] .call_do_softirq+0x14/0x24 <4>[C0000003BA3C3370] [C00000000000BCC8] .do_softirq+0x8c/0xd8 <4>[C0000003BA3C3400] [C0000000000663E4] .local_bh_enable+0x58/0x8c <4>[C0000003BA3C3480] [C0000000002EEA34] .dev_queue_xmit+0x2f0/0x318 <4>[C0000003BA3C3510] [C00000000031CA60] .ip_output+0x348/0x3f0 <4>[C0000003BA3C35B0] [C00000000031D2E0] .ip_queue_xmit+0x4ec/0x5d0 <4>[C0000003BA3C3700] [C00000000032FBA0] .tcp_transmit_skb+0x7d8/0x844 <4>[C0000003BA3C37B0] [C0000000003231A8] .tcp_cleanup_rbuf+0x148/0x168 <4>[C0000003BA3C3840] [C000000000325B24] .tcp_recvmsg+0x8a8/0xa00 <4>[C0000003BA3C3930] [C0000000002E0C64] .sock_common_recvmsg+0x5c/0x84 <4>[C0000003BA3C39C0] [C0000000002DD408] .do_sock_read+0x120/0x14c <4>[C0000003BA3C3A60] [C0000000002DF034] .sock_aio_read+0x58/0x74 <4>[C0000003BA3C3B70] [C0000000000C6050] .do_sync_read+0xd4/0x130 <4>[C0000003BA3C3CF0] [C0000000000C6ECC] .vfs_read+0x134/0x1fc <4>[C0000003BA3C3D90] [C0000000000C7390] .sys_read+0x4c/0x8c <4>[C0000003BA3C3E30] [C00000000000871C] syscall_exit+0x0/0x40