lkml.org 
[lkml]   [2011]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Date
    SubjectRe: Kernel OOPS in function_graph_tracer due to the 44259b1abfaa8bb819d25d41d71e8e33e25dd36a commit (x86-64: Move vread_tsc into a new file with sensible options)
    On 05-30 16:14, Andrew Lutomirski wrote:
    > On Mon, May 30, 2011 at 12:10 PM, Witold Baryluk
    > <baryluk@smp.if.uj.edu.pl> wrote:
    > > Hi,
    > >
    > > I found yesterday a problem when booting system on Pentium-M, 32-bit.
    > >
    > > I got approximetly this
    > >
    > > [    2.459170] Testing tracer function_graph:
    > > [    2.466979] BUG: unable to handle kernel paging request at e421cc10
    >
    > >
    > > Reverting commit 44259b1abfaa8bb819d25d41d71e8e33e25dd36a on top of current
    > > kernel make bug disapear.
    > >
    > > Disabling CONFIG_FUNCTION_GRAPH_TRACER also make bug dispear.
    > >
    >
    > Of course, the most trivial of my patches was the one with the most
    > significant bug. Can you try this fix:
    >
    > http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git;a=commitdiff;h=89e1be50c68eb5e58b873dce87bbac627ee18d1f
    >
    > --Andy

    Fix works. :)

    Compiled with patch and CONFIG_FUNCTION_GRAPH_TRACER enabled, and
    booted 4 times without problem

    [ 6.611505] Testing dynamic ftrace ops #1:
    [ 6.771532] Refined TSC clocksource calibration: 3199.859 MHz.
    [ 6.772337] Switching to clocksource tsc
    [ 6.919805] (1 0 1 1 0) (1 1 2 1 0) (2 1 3 1 215146) (2 2 4 1 215428) PASSED
    [ 7.058209] Testing dynamic ftrace ops #2: (1 0 1 213422 0) (1 1 2 213704 0) (2 1 3 1 184) (2 2 4 270 453) PASSED
    [ 7.646890] Testing tracer irqsoff: PASSED
    [ 7.754403] Testing tracer preemptoff: PASSED
    [ 7.860605] Testing tracer preemptirqsoff: PASSED
    [ 7.970927] Testing tracer wakeup: PASSED
    [ 8.363620] Testing tracer wakeup_rt: PASSED
    [ 8.763273] Testing tracer function_graph: PASSED
    [ 9.052030] HugeTLB registered 2 MB page size, pre-allocated 0 pages
    [ 9.061322] VFS: Disk quotas dquot_6.5.2
    [ 9.065226] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
    [ 9.095324] Registering the id_resolver key type
    [ 9.097664] FS-Cache: Netfs 'nfs' registered for caching
    [ 9.103503] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
    [ 9.111907] fuse init (API version 7.16)
    [ 9.116706] msgmni has been set to 207
    [ 9.143692] cryptomgr_test used greatest stack depth: 6452 bytes left
    [ 9.163685] alg: No test for fcrypt (fcrypt-generic)
    [ 9.205037] alg: No test for stdrng (krng)
    [ 9.452480] NET: Registered protocol family 38
    [ 9.456719] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
    [ 9.458912] io scheduler noop registered
    [ 9.459136] io scheduler deadline registered (default)
    [ 9.459822] io scheduler cfq registered
    [ 9.460551] start plist test
    [ 9.465413] end plist test



    Thanks you.

    I forgot to check linux-tip/next.

    Good work, hope it will land quickly in Linus' tree.


    --
    Witold Baryluk
    [unhandled content-type:application/pgp-signature]
    \
     
     \ /
      Last update: 2011-05-31 00:21    [W:3.251 / U:0.084 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site