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author | Ben Widawsky <bwidawsk@FreeBSD.org> | 2018-11-20 22:49:19 +0000 |
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committer | Ben Widawsky <bwidawsk@FreeBSD.org> | 2018-11-20 22:49:19 +0000 |
commit | c3f4f28c63dad06d16f1b42e90cd91a90036bc36 (patch) | |
tree | 3021b35ccb872c5f555eef9223605358694dddcd /sys/compat | |
parent | edce78c2c444528c5d3044518e6b1db83f0ff71c (diff) | |
download | src-c3f4f28c63dad06d16f1b42e90cd91a90036bc36.tar.gz src-c3f4f28c63dad06d16f1b42e90cd91a90036bc36.zip |
linuxkpi: Add some basic swap functions
These are used by kms-drm to determine various heuristics relate
memory conditions.
The number of free swap pages is just a variable, and it can be
much cheaper by either adding a new getter, or simply extern'ing
swap_total. However, this patch opts to use the more expensive,
existing interface - since this isn't an operation in a high per
path.
This allows us to remove some more gpl linuxkpi and do the follo
kms-drm:
git rm linuxkpi/gplv2/include/linux/swap.h
Reviewed by: mmacy, Johannes Lundberg <johalun0@gmail.com>
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D18052
Notes
Notes:
svn path=/head/; revision=340709
Diffstat (limited to 'sys/compat')
-rw-r--r-- | sys/compat/linuxkpi/common/include/linux/swap.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/swap.h b/sys/compat/linuxkpi/common/include/linux/swap.h new file mode 100644 index 000000000000..132f4c539e6c --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/swap.h @@ -0,0 +1,102 @@ +/*- + * Copyright (c) 2018 Intel Corporation + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _LINUX_SWAP_H_ +#define _LINUX_SWAP_H_ + +#include <vm/swap_pager.h> +#include <vm/vm_pageout.h> + +static inline long +get_nr_swap_pages(void) +{ + int i, j; + + /* NB: This could be done cheaply by obtaining swap_total directly */ + swap_pager_status(&i, &j); + return i - j; +} + +static inline int +current_is_kswapd(void) +{ + return vm_curproc_is_vmproc(); +} + +#endif +/*- + * Copyright (c) 2018 Intel Corporation + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _LINUX_SWAP_H_ +#define _LINUX_SWAP_H_ + +#include <vm/swap_pager.h> +#include <vm/vm_pageout.h> + +static inline long +get_nr_swap_pages(void) +{ + int i, j; + + /* NB: This could be done cheaply by obtaining swap_total directly */ + swap_pager_status(&i, &j); + return i - j; +} + +static inline int +current_is_kswapd(void) +{ + return vm_curproc_is_vmproc(); +} + +#endif |