From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: NFS: Unable to handle kernel NULL pointer dereference at nfs_set_page_dirty+0xd/0x5d in 2.6.21rc7-git6 Date: Tue, 24 Apr 2007 16:05:45 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704241605.45353.ak@suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, trond.myklebust@fys.uio.no List-ID: Another issue hit during LTP testing over nfsroot; this time on a larger box (4 cores; 6GB RAM; x86-64) NFS doesn't seem to be in a good shape for .21 -Andi Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: [] nfs_set_page_dirty+0xd/0x5d PGD 115735067 PUD 11a60a067 PMD 0 Oops: 0000 [1] SMP CPU 1 Modules linked in: Pid: 8476, comm: doio Not tainted 2.6.21-rc7-git6 #20 RIP: 0010:[] [] nfs_set_page_dirty+0xd/0x5d RSP: 0000:ffff8101157b7d98 EFLAGS: 00010292 RAX: 0000000000000000 RBX: ffff81011f9462d8 RCX: 0000000000000004 RDX: ffff810117840430 RSI: 0000000000000004 RDI: ffff81011f9462d8 RBP: ffff81011f9462d8 R08: ffff81011c03f205 R09: ffff81011c03f202 R10: ffff81011a41f228 R11: ffffffff8031075e R12: 0000000114a6cc40 R13: ffff810117840430 R14: ffff81011b3bdb88 R15: ffff81011fd847b0 FS: 00002af288f0bb00(0000) GS:ffff81011c03f0c0(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 0000000117297000 CR4: 00000000000006e0 Process doio (pid: 8476, threadinfo ffff8101157b6000, task ffff81011b8c8240) Stack: ffff81011f9462d8 ffff81011f9462d8 ffff81011f9462d8 ffffffff8025a0bc ffff810114a6cc40 ffffffff80260b75 ffff81011fd77f78 000000011fef0340 00002af289388714 ffff81011a4f04c0 0000000000000c40 ffff81011a952248 Call Trace: [] set_page_dirty_balance+0x9/0x39 [] __handle_mm_fault+0x43e/0x9e1 [] do_page_fault+0x42b/0x7ad [] do_mmap_pgoff+0x619/0x785 [] sys_newfstat+0x20/0x29 [] error_exit+0x0/0x84 Code: 48 8b 28 48 8d 7d a8 e8 eb 26 23 00 48 89 df e8 e9 e6 ff ff RIP [] nfs_set_page_dirty+0xd/0x5d RSP CR2: 0000000000000000 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org