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Date: Fri, 01 Sep 2006 11:43:33 +0800 From: Yao Fei Zhu <walkinair@...ibm.com> To: Andrew Morton <akpm@...l.org> CC: David Chinner <dgc@....com>, linux-kernel@...r.kernel.org, haveblue@...ibm.com, xfs@....sgi.com Subject: Re: kernel BUG in __xfs_get_blocks at fs/xfs/linux-2.6/xfs_aops.c:1293! Andrew Morton wrote: >On Thu, 31 Aug 2006 18:17:26 +1000 >David Chinner <dgc@....com> wrote: > > > >>>BTW, I have CONFIG_PPC_64K_PAGES enabled. >>> >>> >>But that might be a good place to start. Can you see if you can >>reproduce the problem without this config option set? >> >> > >It would be useful to compare the compiler warning output for 64k pages >versus that for smaller-pages. > >Several quite worrisome-looking warnings are emitted from various parts of >the kernel with 64k pages. Related to arithmetic on short types. > > 1. the config diff blade10:/boot # diff config-2.6.18-rc5-ppc64 config-2.6.18-rc5-ppc64.64kp 4c4 < # Thu Aug 31 18:25:42 2006 --- > # Thu Aug 31 21:18:52 2006 51c51 < CONFIG_LOCALVERSION="-ppc64" --- > CONFIG_LOCALVERSION="-ppc64.64kp" 173c173 < CONFIG_FORCE_MAX_ZONEORDER=13 --- > CONFIG_FORCE_MAX_ZONEORDER=9 204c204 < # CONFIG_PPC_64K_PAGES is not set --- > CONFIG_PPC_64K_PAGES=y 2. the compiler warning diff ltctest:~ # diff 4k.warning 64k.warning 0a1,5 > kernel/power/pm.c:205: warning: ‘pm_register’ is deprecated (declared at kernel/power/pm.c:64) > kernel/power/pm.c:205: warning: ‘pm_register’ is deprecated (declared at kernel/power/pm.c:64) > kernel/power/pm.c:206: warning: ‘pm_send_all’ is deprecated (declared at kernel/power/pm.c:180) > kernel/power/pm.c:206: warning: ‘pm_send_all’ is deprecated (declared at kernel/power/pm.c:180) > fs/bio.c:169: warning: ‘idx’ may be used uninitialized in this function 8,13d12 < fs/bio.c:169: warning: ‘idx’ may be used uninitialized in this function < kernel/power/pm.c:205: warning: ‘pm_register’ is deprecated (declared at kernel/power/pm.c:64) < kernel/power/pm.c:205: warning: ‘pm_register’ is deprecated (declared at kernel/power/pm.c:64) < kernel/power/pm.c:206: warning: ‘pm_send_all’ is deprecated (declared at kernel/power/pm.c:180) < kernel/power/pm.c:206: warning: ‘pm_send_all’ is deprecated (declared at kernel/power/pm.c:180) < fs/eventpoll.c:500: warning: ‘fd’ may be used uninitialized in this function 17a17,27 > fs/eventpoll.c:500: warning: ‘fd’ may be used uninitialized in this function > fs/fat/inode.c:1227: warning: comparison is always false due to limited range of data type > fs/hfs/btree.c:243: warning: comparison is always false due to limited range of data type > fs/hfsplus/btree.c:235: warning: comparison is always false due to limited range of data type > fs/ocfs2/vote.c:774: warning: ‘response’ may be used uninitialized in this function > fs/ocfs2/dlm/dlmdomain.c:70: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 7 has type ‘int’ > fs/ocfs2/dlm/dlmdomain.c:70: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 7 has type ‘int’ > fs/ocfs2/dlm/dlmdomain.c:70: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 7 has type ‘int’ > fs/ocfs2/dlm/dlmdomain.c:918: warning: ‘response’ may be used uninitialized in this function > fs/udf/balloc.c:751: warning: ‘goal_eloc.logicalBlockNum’ may be used uninitialized in this function > fs/udf/super.c:1364: warning: ‘ino.partitionReferenceNum’ may be used uninitialized in this function 56a67,68 > drivers/usb/core/devio.c:620: warning: comparison is always false due to limited range of data type > drivers/net/r8169.c:2131: warning: ‘txd’ may be used uninitialized in this function 59d70 < drivers/net/r8169.c:2131: warning: ‘txd’ may be used uninitialized in this function 70,73c81 < fs/ocfs2/vote.c:774: warning: ‘response’ may be used uninitialized in this function < fs/ocfs2/dlm/dlmdomain.c:918: warning: ‘response’ may be used uninitialized in this function < fs/udf/balloc.c:751: warning: ‘goal_eloc.logicalBlockNum’ may be used uninitialized in this function < fs/udf/super.c:1364: warning: ‘ino.partitionReferenceNum’ may be used uninitialized in this function --- > net/key/af_key.c:403: warning: comparison is always false due to limited range of data type - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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