i 在 2008年2月2日星期六UTC+8上午1时27分50秒,Zoltan Menyhart写道: > I have got a crash on an 8 processor ia64 machine with the kernel 2.6.18.8: > > [<a00000010003cb30>] ia64_fault+0x14b0/0x1600 > sp=e00000019ea5f930 bsp=e00000019ea51408 > r32 : 000000000000001a r33 : 0000000400000020 r34 : 0000000000000010 > r35 : 000000000003800f r36 : e00000019ea5fbb8 r37 : e00000019ea5fbb0 > r38 : a00000010027f2e0 r39 : e00000019ea5f9c0 r40 : 000000000000000b > r41 : a00000010000c4e0 r42 : 0000000000000005 r43 : a000000100a90050 > [<a00000010000c4e0>] ia64_leave_kernel+0x0/0x280 > sp=e00000019ea5fb60 bsp=e00000019ea51408 > [<a00000010027f2e0>] rb_insert_color+0x60/0x380 > sp=e00000019ea5fd30 bsp=e00000019ea513b8 > r32 : e0000004acb19448 r33 : e00000052a7ba100 r34 : e0000002799a5908 > r35 : 0000000000000000 r36 : a0000002046f7810 r37 : 0000000000000690 > r38 : 6f732e7365725f73 r39 : e0000004acb1c708 r40 : e00000052a7ba100 > [<a0000002046f7810>] ext3_htree_store_dirent+0x270/0x2e0 [ext3] > sp=e00000019ea5fd30 bsp=e00000019ea51350 > r32 : e00000052a7ba100 r33 : 0000000059bf4f42 r34 : 0000000026f5c228 > r35 : e00000082bb9063c r36 : e0000004acb19440 r37 : e0000002799a5918 > r38 : 000000000000003d r39 : e00000082bb90642 r40 : e0000004acb19444 > r41 : e0000002799a5908 r42 : a000000204708a70 r43 : 0000000000000611 > r44 : a000000204716448 > [<a000000204708a70>] htree_dirblock_to_tree+0x1b0/0x280 [ext3] > sp=e00000019ea5fd30 bsp=e00000019ea512f0 > r32 : e000000126191780 r33 : e00000082bb907f8 r34 : e00000082bb9063c > r35 : e00000019ea5fd50 r36 : 0000000000000000 r37 : 0000000000000000 > r38 : e00000014ff15b68 r39 : 0000000000000018 r40 : e00000019ea5fd54 > r41 : a000000204708c40 r42 : 0000000000000795 r43 : a000000204716448 > [<a000000204708c40>] ext3_htree_fill_tree+0x100/0x460 [ext3] > sp=e00000019ea5fd40 bsp=e00000019ea51278 > r32 : e000000126191780 r33 : 0000000000000000 r34 : 0000000000000000 > r35 : e00000052a7ba128 r36 : a0000002046f82b0 r37 : e00000014ff060b8 > r38 : 0000000000000000 r39 : 00000000000000d0 r40 : 60000000000101cc > r41 : 600ffffffa5ff5b0 r42 : 600ffffffa5ff618 r43 : 000000000000f000 > r44 : a0000002046f82f0 r45 : 0000000000000fa6 r46 : a000000204716448 > [<a0000002046f82f0>] ext3_readdir+0x890/0xcc0 [ext3] > sp=e00000019ea5fda0 bsp=e00000019ea51178 > r32 : e000000126191780 r33 : e00000019ea5fe20 r34 : a000000100656570 > r35 : e00000052a7ba108 r36 : e00000052a7ba100 r37 : e00000052a7ba124 > r38 : e00000052a7ba120 r39 : e00000014ff06160 r40 : e000000126191830 > r41 : e0000001261917b8 r42 : e00000052a7ba128 r43 : e000000126191790 > r44 : e00000052a7ba118 r45 : e00000014ff060b8 r46 : e00000052a7ba124 > r47 : e00000087a0b5980 r48 : e00000087a0b59a0 r49 : e00000052a7ba108 > r50 : 0000000000000000 r51 : 0000000000000000 r52 : 0000000000000000 > r53 : 0000000000000793 r54 : e00000019ea5fe00 r55 : 0000000000000001 > r56 : 0000000000000793 r57 : 0000000000000000 r58 : 200000000003cc7c > r59 : a00000010017bd60 r60 : 000000000000058e r61 : a000000204716448 > r62 : 000000001555a559 > [<a00000010017bd60>] vfs_readdir+0x1a0/0x200 > sp=e00000019ea5fe10 bsp=e00000019ea51120 > r32 : e000000126191780 r33 : a000000100656570 r34 : e00000019ea5fe20 > r35 : fffffffffffffffe r36 : e0000001261917a0 r37 : e00000014ff060b8 > r38 : e000000126191790 r39 : e00000014ff06178 r40 : a00000010017c540 > r41 : 0000000000000915 r42 : a000000100a90050 > > Here is the beginning of rb_insert_color(): > > void rb_insert_color(struct rb_node *node, struct rb_root *root) > { > struct rb_node *parent, *gparent; > > while ((parent = rb_parent(node)) && rb_is_red(parent)) { > gparent = rb_parent(parent); > if (parent == gparent->rb_left) { > > When it crashes, I've got the following nodes: > > p/x *((struct rb_node *) 0xe0000004acb19448) // node > { > rb_parent_color = 0xe0000002799a5908, > rb_right = 0x0, > rb_left = 0x0 > } > p/x *((struct rb_node *) 0xe0000002799a5908) // parent = rb_parent(node) > { > rb_parent_color = 0x0, > rb_right = 0x0, > rb_left = 0xa000000100650000 // seems to be valid > } > > Note that "node" is not necessarily the same as the argument of > rb_insert_color() was. > > gparent = rb_parent(parent) is NULL, and the kernel obviously traps > at if (parent == gparent->rb_left). > > Does the algorithm guarantee that if a node is red, it must have a parent? > I guess yes. > (I have not seen any modification in rb_insert_color() since my 2.6.18.8.) > > Is mutex_lock(&inode->i_mutex) in vfs_readdir() enough to protect the tree? > I guess yes. > > I have got no idea how it can happen. > Has something been corrected since? > > Regards, > > Zoltan Menyhart > > > -- > 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/
i got similar problem,have you found the reason? -- 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/