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Revision 584ee3dcb1d6232857c1e38bb28d9f6bf0ec89f5 authored by Alexandra Yates on 18 November 2015, 22:58:40 UTC, committed by Rafael J. Wysocki on 25 November 2015, 22:37:44 UTC 
intel_pstate: Fix "performance" mode behavior with HWP enabled
 
If hardware-driven P-state selection (HWP) is enabled, the
"performance" mode of intel_pstate should only allow the processor
to use the highest-performance P-state available.  That is not
the case currently, so make it actually happen.

Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Alexandra Yates <alexandra.yates@linux.intel.com>
[ rjw: Subject and changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1 parent 73124ce
Raw File
buffer.c 

#include <linux/ceph/ceph_debug.h>

#include <linux/module.h>
#include <linux/slab.h>

#include <linux/ceph/buffer.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/libceph.h> /* for ceph_kvmalloc */

struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
{
	struct ceph_buffer *b;

	b = kmalloc(sizeof(*b), gfp);
	if (!b)
		return NULL;

	b->vec.iov_base = ceph_kvmalloc(len, gfp);
	if (!b->vec.iov_base) {
		kfree(b);
		return NULL;
	}

	kref_init(&b->kref);
	b->alloc_len = len;
	b->vec.iov_len = len;
	dout("buffer_new %p\n", b);
	return b;
}
EXPORT_SYMBOL(ceph_buffer_new);

void ceph_buffer_release(struct kref *kref)
{
	struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);

	dout("buffer_release %p\n", b);
	kvfree(b->vec.iov_base);
	kfree(b);
}
EXPORT_SYMBOL(ceph_buffer_release);

int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
{
	size_t len;

	ceph_decode_need(p, end, sizeof(u32), bad);
	len = ceph_decode_32(p);
	dout("decode_buffer len %d\n", (int)len);
	ceph_decode_need(p, end, len, bad);
	*b = ceph_buffer_new(len, GFP_NOFS);
	if (!*b)
		return -ENOMEM;
	ceph_decode_copy(p, (*b)->vec.iov_base, len);
	return 0;
bad:
	return -EINVAL;
}
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