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  1. 02 5月, 2010 1 次提交
  3. 11 4月, 2010 2 次提交
  5. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      由 Tejun Heo 提交于 
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: NTejun Heo <tj@kernel.org>
Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  7. 28 3月, 2010 1 次提交
  9. 20 2月, 2010 5 次提交
  11. 18 2月, 2010 1 次提交
  13. 19 1月, 2010 3 次提交
  15. 18 1月, 2010 1 次提交
  17. 31 12月, 2009 2 次提交
  19. 10 12月, 2009 2 次提交
    • G
      [SCSI] qla2xxx: Queue depth ramp up/down modification changes. · c45dd305
      由 Giridhar Malavali 提交于 
      Removed the module parameters ql2xqfulltracking and ql2xqfullrampup
since the queue depth ramp up/down functionality is moved to scsi-ml.
Signed-off-by: NGiridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      c45dd305
    • M
      [SCSI] qla2xxx: dpc thread can execute before scsi host has been added · 1486400f
      由 Michael Reed 提交于 
      Fix crash in qla2x00_fdmi_register() due to the dpc
thread executing before the scsi host has been fully
added.

Unable to handle kernel NULL pointer dereference (address 00000000000001d0)
qla2xxx_7_dpc[4140]: Oops 8813272891392 [1]

Call Trace:
 [<a000000100016910>] show_stack+0x50/0xa0
                                sp=e00000b07c59f930 bsp=e00000b07c591400
 [<a000000100017180>] show_regs+0x820/0x860
                                sp=e00000b07c59fb00 bsp=e00000b07c5913a0
 [<a00000010003bd60>] die+0x1a0/0x2e0
                                sp=e00000b07c59fb00 bsp=e00000b07c591360
 [<a0000001000681a0>] ia64_do_page_fault+0x8c0/0x9e0
                                sp=e00000b07c59fb00 bsp=e00000b07c591310
 [<a00000010000c8e0>] ia64_native_leave_kernel+0x0/0x270
                                sp=e00000b07c59fb90 bsp=e00000b07c591310
 [<a000000207197350>] qla2x00_fdmi_register+0x850/0xbe0 [qla2xxx]
                                sp=e00000b07c59fd60 bsp=e00000b07c591290
 [<a000000207171570>] qla2x00_configure_loop+0x1930/0x34c0 [qla2xxx]
                                sp=e00000b07c59fd60 bsp=e00000b07c591128
 [<a0000002071732b0>] qla2x00_loop_resync+0x1b0/0x2e0 [qla2xxx]
                                sp=e00000b07c59fdf0 bsp=e00000b07c5910c0
 [<a000000207166d40>] qla2x00_do_dpc+0x9a0/0xce0 [qla2xxx]
                                sp=e00000b07c59fdf0 bsp=e00000b07c590fa0
 [<a0000001000d5bb0>] kthread+0x110/0x140
                                sp=e00000b07c59fe00 bsp=e00000b07c590f68
 [<a000000100014a30>] kernel_thread_helper+0xd0/0x100
                                sp=e00000b07c59fe30 bsp=e00000b07c590f40
 [<a00000010000a4c0>] start_kernel_thread+0x20/0x40
                                sp=e00000b07c59fe30 bsp=e00000b07c590f40

crash> dis a000000207197350
0xa000000207197350 <qla2x00_fdmi_register+2128>:        [MMI]       ld1 r45=[r14];;
crash> scsi_qla_host.host 0xe00000b058c73ff8
  host = 0xe00000b058c73be0,
crash> Scsi_Host.shost_data 0xe00000b058c73be0
  shost_data = 0x0,  <<<<<<<<<<<

The fc_transport fc_* workqueue threads have yet to be created.

crash> ps | grep _7
   3891      2   2  e00000b075c80000  IN   0.0       0      0  [scsi_eh_7]
   4140      2   3  e00000b07c590000  RU   0.0       0      0  [qla2xxx_7_dpc]

The thread creating adding the Scsi_Host is blocked due to other
activity in sysfs.

crash> bt 3762
PID: 3762   TASK: e00000b071e70000  CPU: 3   COMMAND: "modprobe"
 #0 [BSP:e00000b071e71548] schedule at a000000100727e00
 #1 [BSP:e00000b071e714c8] __mutex_lock_slowpath at a0000001007295a0
 #2 [BSP:e00000b071e714a8] mutex_lock at a000000100729830
 #3 [BSP:e00000b071e71478] sysfs_addrm_start at a0000001002584f0
 #4 [BSP:e00000b071e71440] create_dir at a000000100259350
 #5 [BSP:e00000b071e71410] sysfs_create_subdir at a000000100259510
 #6 [BSP:e00000b071e713b0] internal_create_group at a00000010025c880
 #7 [BSP:e00000b071e71388] sysfs_create_group at a00000010025cc50
 #8 [BSP:e00000b071e71368] dpm_sysfs_add at a000000100425050
 #9 [BSP:e00000b071e71310] device_add at a000000100417d90
#10 [BSP:e00000b071e712d8] scsi_add_host at a00000010045a380
#11 [BSP:e00000b071e71268] qla2x00_probe_one at a0000002071be950
#12 [BSP:e00000b071e71248] local_pci_probe at a00000010032e490
#13 [BSP:e00000b071e71218] pci_device_probe at a00000010032ecd0
#14 [BSP:e00000b071e711d8] driver_probe_device at a00000010041d480
#15 [BSP:e00000b071e711a8] __driver_attach at a00000010041d6e0
#16 [BSP:e00000b071e71170] bus_for_each_dev at a00000010041c240
#17 [BSP:e00000b071e71150] driver_attach at a00000010041d0a0
#18 [BSP:e00000b071e71108] bus_add_driver at a00000010041b080
#19 [BSP:e00000b071e710c0] driver_register at a00000010041dea0
#20 [BSP:e00000b071e71088] __pci_register_driver at a00000010032f610
#21 [BSP:e00000b071e71058] (unknown) at a000000207200270
#22 [BSP:e00000b071e71018] do_one_initcall at a00000010000a9c0
#23 [BSP:e00000b071e70f98] sys_init_module at a0000001000fef00
#24 [BSP:e00000b071e70f98] ia64_ret_from_syscall at a00000010000c740

So, it appears that qla2xxx dpc thread is moving forward before the
scsi host has been completely added.

This patch moves the setting of the init_done (and online) flag to
after the call to scsi_add_host() to hold off the dpc thread.

Found via large lun count testing using 2.6.31.
Signed-off-by: NMichael Reed <mdr@sgi.com>
Acked-by: NGiridhar Malavali <giridhar.malavali@qlogic.com>
Cc: stable@kernel.org
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      1486400f
  21. 05 12月, 2009 3 次提交
  23. 12 9月, 2009 4 次提交
  25. 05 9月, 2009 2 次提交
  27. 23 8月, 2009 1 次提交
  29. 21 6月, 2009 1 次提交
  31. 09 6月, 2009 5 次提交
  33. 21 5月, 2009 5 次提交