lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86/irq: use move_irq_desc() in create_irq_nr()

Browse Source 
move_irq_desc() will try to move irq_desc to the home node if
the allocated one is not correct, in create_irq_nr().

( This can happen on devices that are on different nodes that
  are using MSI, when drivers are loaded and unloaded randomly. )

v2: fix non-smp build
v3: add NUMA_IRQ_DESC to eliminate #ifdefs

[ Impact: improve irq descriptor locality on NUMA systems ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F95EAE.2050903@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2009-04-30 01:17:50 -07:00
committed by Ingo Molnar
parent 56b581ea95
commit 15e957d08d
4 changed files with 15 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/kernel/apic/io_apic.c
View File

@@ -3197,11 +3197,7 @@ unsigned int create_irq_nr(unsigned int irq_want, int node)
if (cfg_new->vector != 0)
continue;
#ifdef CONFIG_NUMA_IRQ_DESC
/* different node ?*/
if (desc_new->node != node)
desc = move_irq_desc(desc, node);
#endif
desc_new = move_irq_desc(desc_new, node);
if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0)
irq = new;