litmus-rt.git - The LITMUS^RT kernel.

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author	Mark Fasheh <mfasheh@suse.de>	2011-11-16 15:03:10 -0500
committer	Joel Becker <jlbec@evilplan.org>	2011-11-17 05:15:58 -0500
commit	df295d4a4b3c98af1a2445a82aef169e7e5d96b8 (patch)
tree	e262858cac79bdffe8e139aa5d445e0b4bb9b8a0 /include/linux/atm_tcp.h
parent	0393afea31874947b1d149b82d17b7dccac4f210 (diff)

ocfs2: honor O_(D)SYNC flag in fallocate

We need to sync the transaction which updates i_size if the file is marked as needing sync semantics. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Joel Becker <jlbec@evilplan.org>

Diffstat (limited to 'include/linux/atm_tcp.h')

0 files changed, 0 insertions, 0 deletions

ChangeLog: Started by Ingo Molnar <mingo@redhat.com> Update by Max Krasnyansky <maxk@qualcomm.com> SMP IRQ affinity /proc/irq/IRQ#/smp_affinity specifies which target CPUs are permitted for a given IRQ source. It's a bitmask of allowed CPUs. It's not allowed to turn off all CPUs, and if an IRQ controller does not support IRQ affinity then the value will not change from the default 0xffffffff. /proc/irq/default_smp_affinity specifies default affinity mask that applies to all non-active IRQs. Once IRQ is allocated/activated its affinity bitmask will be set to the default mask. It can then be changed as described above. Default mask is 0xffffffff. Here is an example of restricting IRQ44 (eth1) to CPU0-3 then restricting it to CPU4-7 (this is an 8-CPU SMP box): [root@moon 44]# cd /proc/irq/44 [root@moon 44]# cat smp_affinity ffffffff [root@moon 44]# echo 0f > smp_affinity [root@moon 44]# cat smp_affinity 0000000f [root@moon 44]# ping -f h PING hell (195.4.7.3): 56 data bytes ... --- hell ping statistics --- 6029 packets transmitted, 6027 packets received, 0% packet loss round-trip min/avg/max = 0.1/0.1/0.4 ms [root@moon 44]# cat /proc/interrupts | grep 'CPU\|44:' CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 44: 1068 1785 1785 1783 0 0 0 0 IO-APIC-level eth1 As can be seen from the line above IRQ44 was delivered only to the first four processors (0-3). Now lets restrict that IRQ to CPU(4-7). [root@moon 44]# echo f0 > smp_affinity [root@moon 44]# cat smp_affinity 000000f0 [root@moon 44]# ping -f h PING hell (195.4.7.3): 56 data bytes .. --- hell ping statistics --- 2779 packets transmitted, 2777 packets received, 0% packet loss round-trip min/avg/max = 0.1/0.5/585.4 ms [root@moon 44]# cat /proc/interrupts | 'CPU\|44:' CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 44: 1068 1785 1785 1783 1784 1069 1070 1069 IO-APIC-level eth1 This time around IRQ44 was delivered only to the last four processors. i.e counters for the CPU0-3 did not change.


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