Skip to content

K
Kernel

openeuler / Kernel
1 年多 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
切换分支/标签
  1. 30 10月, 2011 12 次提交
  3. 26 9月, 2011 1 次提交
  5. 16 9月, 2011 1 次提交
  7. 15 9月, 2011 1 次提交
  9. 27 8月, 2011 3 次提交
  11. 24 8月, 2011 2 次提交
  13. 18 8月, 2011 1 次提交
  15. 13 8月, 2011 7 次提交
  17. 03 8月, 2011 5 次提交
  19. 27 7月, 2011 1 次提交
  21. 24 7月, 2011 4 次提交
    • S
      [S390] dasd: add enhanced DASD statistics interface · 4fa52aa7
      由 Stefan Weinhuber 提交于 
      This patch extends the DASD statistics to allow for a more detailed
analysis of DASD I/O operations. In particular we want the statistics
to provide answers to the following questions:
- How many requests used a PAV alias?
- How many requests used High Performance FICON?
- How do read request perform versus write requests?

The existing DASD statistics interface has several shortcomings
- The interface for global data is a formatted text table in procfs
  (/proc/dasd/statistics). The layout is meant for human readers and
  is not to easy to parse. If values get to large for the table
  layout, they get scaled down.
- The statistics which are collected per block device can be
  accessed via an ioctl interface, which can only be extended by
  defining a new ioctl.
- There is no statistics interface for individual PAV base and alias
  devices.

To overcome theses shortcomings we create a new DASD statistics
interface in debugfs. This interface will contain one entry for global
data, one per DASD block device, and one per DASD base and alias
device. Each file contains the statistic data in easy to parse
name/value and name/array pairs. The existing interfaces will remain
functional, but they will not be extended.
Signed-off-by: NStefan Weinhuber <wein@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      4fa52aa7
    • H
      [S390] ap: toleration support for ap device type 10 · 6bed05bc
      由 Holger Dengler 提交于 
      Add toleration support for ap devices with device type 10.
Signed-off-by: NHolger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      6bed05bc
    • J
      [S390] qdio: clear shared DSCI before scheduling the queue handler · b02f0c2e
      由 Jan Glauber 提交于 
      The following race can occur with qdio devices that use the shared device
state change indicator:

Device (Shared DSCI)    CPU0                            CPU1
===============================================================================

1. DSCI 0 => 1,
   INT pending
                        2. Thinint handler
                        * si_used = 1
                        * Inbound tasklet_schedule
                        * DSCI 1 => 0

3. DSCI 0 => 1,
   INT pending

                                                        4. Thinint handler
                                                        * si_used = 1
                                                        * Inbound tasklet_schedu
le
                                                           => NOP

                        5. Inbound tasklet run

6. DSCI = 1,
   INT surpressed

                                                        7. DSCI 1 => 0

The race would lead to a stall where new data in the input queue is
not recognized so the device stops working in case of no further traffic.

Fix the race by resetting the DSCI before scheduling the inbound tasklet
so the device generates an interrupt if new data arrives in the above
scenario in step 6.
Reviewed-by: NUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: NJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      b02f0c2e
    • M
      [S390] kconfig: remove tape interface support comment · 284ecb00
      由 Martin Schwidefsky 提交于 
      There is nothing below the menu entry "S/390 tape interface support".
Remove it.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      284ecb00
  23. 22 7月, 2011 1 次提交
  25. 18 7月, 2011 1 次提交