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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-09-21 16:08:49 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-06 14:21:50 +0200 |
| commit | 906010b2134e14a2e377decbadd357b3d0ab9c6a (patch) | |
| tree | 598b30d08f5ca8df1e00abc295b120fa1bd2c2e2 /include/linux | |
| parent | e13dbd7d75d1ecc315c6e3071b3c4e8fba4f6bec (diff) | |
| download | op-kernel-dev-906010b2134e14a2e377decbadd357b3d0ab9c6a.zip op-kernel-dev-906010b2134e14a2e377decbadd357b3d0ab9c6a.tar.gz | |
perf_event: Provide vmalloc() based mmap() backing
Some architectures such as Sparc, ARM and MIPS (basically
everything with flush_dcache_page()) need to deal with dcache
aliases by carefully placing pages in both kernel and user maps.
These architectures typically have to use vmalloc_user() for this.
However, on other architectures, vmalloc() is not needed and has
the downsides of being more restricted and slower than regular
allocations.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: David Miller <davem@davemloft.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1254830228.21044.272.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/perf_event.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 3a9d36d..2e6d95f 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -442,6 +442,7 @@ enum perf_callchain_context { #include <linux/hrtimer.h> #include <linux/fs.h> #include <linux/pid_namespace.h> +#include <linux/workqueue.h> #include <asm/atomic.h> #define PERF_MAX_STACK_DEPTH 255 @@ -513,6 +514,10 @@ struct file; struct perf_mmap_data { struct rcu_head rcu_head; +#ifdef CONFIG_PERF_USE_VMALLOC + struct work_struct work; +#endif + int data_order; int nr_pages; /* nr of data pages */ int writable; /* are we writable */ int nr_locked; /* nr pages mlocked */ |
