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Merge branch 'akpm' (final batch from Andrew)
Merge third patch-bumb from Andrew Morton:
"This wraps me up for -rc1.
- Lots of misc stuff and things which were deferred/missed from
patchbombings 1 & 2.
- ocfs2 things
- lib/scatterlist
- hfsplus
- fatfs
- documentation
- signals
- procfs
- lockdep
- coredump
- seqfile core
- kexec
- Tejun's large IDR tree reworkings
- ipmi
- partitions
- nbd
- random() things
- kfifo
- tools/testing/selftests updates
- Sasha's large and pointless hlist cleanup"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (163 commits)
hlist: drop the node parameter from iterators
kcmp: make it depend on CHECKPOINT_RESTORE
selftests: add a simple doc
tools/testing/selftests/Makefile: rearrange targets
selftests/efivarfs: add create-read test
selftests/efivarfs: add empty file creation test
selftests: add tests for efivarfs
kfifo: fix kfifo_alloc() and kfifo_init()
kfifo: move kfifo.c from kernel/ to lib/
arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS
w1: add support for DS2413 Dual Channel Addressable Switch
memstick: move the dereference below the NULL test
drivers/pps/clients/pps-gpio.c: use devm_kzalloc
Documentation/DMA-API-HOWTO.txt: fix typo
include/linux/eventfd.h: fix incorrect filename is a comment
mtd: mtd_stresstest: use prandom_bytes()
mtd: mtd_subpagetest: convert to use prandom library
mtd: mtd_speedtest: use prandom_bytes
mtd: mtd_pagetest: convert to use prandom library
mtd: mtd_oobtest: convert to use prandom library
...
This commit is contained in:
Linus Torvalds
@@ -488,9 +488,10 @@ will invoke the generic mapping error check interface. Doing so will ensure
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that the mapping code will work correctly on all dma implementations without
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any dependency on the specifics of the underlying implementation. Using the
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returned address without checking for errors could result in failures ranging
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from panics to silent data corruption. Couple of example of incorrect ways to
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check for errors that make assumptions about the underlying dma implementation
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are as follows and these are applicable to dma_map_page() as well.
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from panics to silent data corruption. A couple of examples of incorrect ways
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to check for errors that make assumptions about the underlying dma
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implementation are as follows and these are applicable to dma_map_page() as
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well.
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Incorrect example 1:
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dma_addr_t dma_handle;
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@@ -751,7 +752,7 @@ Example 1:
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dma_unmap_single(dma_handle1);
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map_error_handling1:
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Example 2: (if buffers are allocated a loop, unmap all mapped buffers when
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Example 2: (if buffers are allocated in a loop, unmap all mapped buffers when
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mapping error is detected in the middle)
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dma_addr_t dma_addr;
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+12
-6
@@ -348,34 +348,40 @@ You can change this at module load time (for a module) with:
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modprobe ipmi_si.o type=<type1>,<type2>....
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ports=<port1>,<port2>... addrs=<addr1>,<addr2>...
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irqs=<irq1>,<irq2>... trydefaults=[0|1]
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irqs=<irq1>,<irq2>...
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regspacings=<sp1>,<sp2>,... regsizes=<size1>,<size2>,...
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regshifts=<shift1>,<shift2>,...
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slave_addrs=<addr1>,<addr2>,...
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force_kipmid=<enable1>,<enable2>,...
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kipmid_max_busy_us=<ustime1>,<ustime2>,...
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unload_when_empty=[0|1]
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trydefaults=[0|1] trydmi=[0|1] tryacpi=[0|1]
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tryplatform=[0|1] trypci=[0|1]
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Each of these except si_trydefaults is a list, the first item for the
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Each of these except try... items is a list, the first item for the
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first interface, second item for the second interface, etc.
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The si_type may be either "kcs", "smic", or "bt". If you leave it blank, it
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defaults to "kcs".
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If you specify si_addrs as non-zero for an interface, the driver will
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If you specify addrs as non-zero for an interface, the driver will
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use the memory address given as the address of the device. This
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overrides si_ports.
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If you specify si_ports as non-zero for an interface, the driver will
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If you specify ports as non-zero for an interface, the driver will
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use the I/O port given as the device address.
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If you specify si_irqs as non-zero for an interface, the driver will
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If you specify irqs as non-zero for an interface, the driver will
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attempt to use the given interrupt for the device.
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si_trydefaults sets whether the standard IPMI interface at 0xca2 and
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trydefaults sets whether the standard IPMI interface at 0xca2 and
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any interfaces specified by ACPE are tried. By default, the driver
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tries it, set this value to zero to turn this off.
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The other try... items disable discovery by their corresponding
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names. These are all enabled by default, set them to zero to disable
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them. The tryplatform disables openfirmware.
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The next three parameters have to do with register layout. The
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registers used by the interfaces may not appear at successive
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locations and they may not be in 8-bit registers. These parameters
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@@ -4,43 +4,13 @@
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can use a remote server as one of its block devices. So every time
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the client computer wants to read, e.g., /dev/nb0, it sends a
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request over TCP to the server, which will reply with the data read.
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This can be used for stations with low disk space (or even diskless -
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if you boot from floppy) to borrow disk space from another computer.
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Unlike NFS, it is possible to put any filesystem on it, etc. It should
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even be possible to use NBD as a root filesystem (I've never tried),
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but it requires a user-level program to be in the initrd to start.
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It also allows you to run block-device in user land (making server
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and client physically the same computer, communicating using loopback).
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Current state: It currently works. Network block device is stable.
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I originally thought that it was impossible to swap over TCP. It
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turned out not to be true - swapping over TCP now works and seems
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to be deadlock-free, but it requires heavy patches into Linux's
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network layer.
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This can be used for stations with low disk space (or even diskless)
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to borrow disk space from another computer.
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Unlike NFS, it is possible to put any filesystem on it, etc.
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For more information, or to download the nbd-client and nbd-server
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tools, go to http://nbd.sf.net/.
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Howto: To setup nbd, you can simply do the following:
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First, serve a device or file from a remote server:
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nbd-server <port-number> <device-or-file-to-serve-to-client>
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e.g.,
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root@server1 # nbd-server 1234 /dev/sdb1
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(serves sdb1 partition on TCP port 1234)
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Then, on the local (client) system:
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nbd-client <server-name-or-IP> <server-port-number> /dev/nb[0-n]
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e.g.,
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root@client1 # nbd-client server1 1234 /dev/nb0
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(creates the nb0 device on client1)
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The nbd kernel module need only be installed on the client
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system, as the nbd-server is completely in userspace. In fact,
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the nbd-server has been successfully ported to other operating
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@@ -75,7 +75,7 @@ Throttling/Upper Limit policy
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mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
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- Specify a bandwidth rate on particular device for root group. The format
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for policy is "<major>:<minor> <byes_per_second>".
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for policy is "<major>:<minor> <bytes_per_second>".
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echo "8:16 1048576" > /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device
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