Displaying 20 results from an estimated 27 matches for "vmalloc'ed".
2013 Jul 25
0
How to get the PFN of a vmalloc'ed address in a domU ?
...if (op.status) {
DPRINTK("error: grant table mapping failed\n");
goto err_unmap;
}
x->buffer_handles[i] = op.handle;
grefp = (int *)(x->buffer_addr + i * PAGE_SIZE);
}
The mapping is successful. I then try to get a reference to these pages :
if(is_vmalloc_addr((void *)(x->buffer_addr+recv_offset*PAGE_SIZE)))
printk(KERN_INFO "Is vmalloc addr\n"); // As this text is displayed, I
verified it''s a vmalloc''ed page
if(virt_addr_valid((void *)(x->buffer_addr+recv_offset*PAGE_SIZE)))
printk(KERN_INFO "Is virt a...
2007 Apr 18
1
[PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
...=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- linux-2.6.13.orig/arch/i386/mm/init.c 2005-08-04 14:39:17.000000000 -07=
00
+++ linux-2.6.13/arch/i386/mm/init.c 2005-08-05 15:20:04.000000000 -0700
@@ -42,6 +42,10 @@
=
unsigned int __VMALLOC_RESERVE =3D 128 << 20;
=
+#ifdef CONFIG_RELOCATABLE_FIXMAP
+unsigned long __FIXADDR_TOP =3D 0;
+#endif
+
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long highstart_pfn, highend_pfn;
=
@@ -478,6 +482,12 @@
printk("NX (Execute Disable) protection: active\n");
#e...
2007 Apr 18
1
[PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
...=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- linux-2.6.13.orig/arch/i386/mm/init.c 2005-08-04 14:39:17.000000000 -07=
00
+++ linux-2.6.13/arch/i386/mm/init.c 2005-08-05 15:20:04.000000000 -0700
@@ -42,6 +42,10 @@
=
unsigned int __VMALLOC_RESERVE =3D 128 << 20;
=
+#ifdef CONFIG_RELOCATABLE_FIXMAP
+unsigned long __FIXADDR_TOP =3D 0;
+#endif
+
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long highstart_pfn, highend_pfn;
=
@@ -478,6 +482,12 @@
printk("NX (Execute Disable) protection: active\n");
#e...
2007 Apr 18
1
[RFC, PATCH 7/24] i386 Vmi memory hole
.../fixmap.h
===================================================================
--- linux-2.6.16-rc3.orig/include/asm-i386/fixmap.h 2006-02-22 15:48:23.000000000 -0800
+++ linux-2.6.16-rc3/include/asm-i386/fixmap.h 2006-02-22 16:33:27.000000000 -0800
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+#define __FIXADDR_TOP 0xfffff000-(CONFIG_MEMORY_HOLE << 20)
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
2007 Apr 18
1
[PATCH 5/5] Create a hole in high linear address space
...asm-i386/fixmap.h
===================================================================
--- linux-2.6.13.orig/include/asm-i386/fixmap.h 2005-08-24 09:30:43.000000000 -0700
+++ linux-2.6.13/include/asm-i386/fixmap.h 2005-08-24 10:04:42.000000000 -0700
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+#define __FIXADDR_TOP (0xfffff000-(CONFIG_MEMORY_HOLE << 20))
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
2007 Apr 18
1
[PATCH 5/5] Create a hole in high linear address space
...asm-i386/fixmap.h
===================================================================
--- linux-2.6.13.orig/include/asm-i386/fixmap.h 2005-08-24 09:30:43.000000000 -0700
+++ linux-2.6.13/include/asm-i386/fixmap.h 2005-08-24 10:04:42.000000000 -0700
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+#define __FIXADDR_TOP (0xfffff000-(CONFIG_MEMORY_HOLE << 20))
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
2007 Apr 18
1
[RFC, PATCH 7/24] i386 Vmi memory hole
.../fixmap.h
===================================================================
--- linux-2.6.16-rc3.orig/include/asm-i386/fixmap.h 2006-02-22 15:48:23.000000000 -0800
+++ linux-2.6.16-rc3/include/asm-i386/fixmap.h 2006-02-22 16:33:27.000000000 -0800
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+#define __FIXADDR_TOP 0xfffff000-(CONFIG_MEMORY_HOLE << 20)
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
2018 Apr 19
1
[PATCH v2 net 1/3] virtio_net: split out ctrl buffer
When sending control commands, virtio net sets up several buffers for
DMA. The buffers are all part of the net device which means it's
actually allocated by kvmalloc so it's in theory (on extreme memory
pressure) possible to get a vmalloc'ed buffer which on some platforms
means we can't DMA there.
Fix up by moving the DMA buffers into a separate structure.
Reported-by: Mikulas Patocka <mpatocka at redhat.com>
Suggested-by: Eric Dumazet <e...
2018 Apr 19
3
[PATCH net] virtio_net: split out ctrl buffer
When sending control commands, virtio net sets up several buffers for
DMA. The buffers are all part of the net device which means it's
actually allocated by kvmalloc so in theory (on extreme memory pressure)
it's possible to get a vmalloc'ed buffer which on some platforms means
we can't DMA there.
Fix up by moving the DMA buffers out into a separate structure.
Reported-by: Mikulas Patocka <mpatocka at redhat.com>
Suggested-by: Eric Dumazet &...
2007 Apr 18
2
[PATCH] exec-shield style vdso move.
...-2.6.17-rc4-git3.updated/include/asm-i386/fixmap.h
--- .23560-linux-2.6.17-rc4-git3/include/asm-i386/fixmap.h 2006-03-23 12:43:10.000000000 +1100
+++ .23560-linux-2.6.17-rc4-git3.updated/include/asm-i386/fixmap.h 2006-05-17 17:10:49.000000000 +1000
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+extern unsigned long __FIXADDR_TOP;
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
@@ -95,6 +95,8 @@ enum fixed_addresses {
extern void __set_fixmap (enum fixed_addresses idx,
unsigned long phys,...
2007 Apr 18
2
[PATCH] exec-shield style vdso move.
...-2.6.17-rc4-git3.updated/include/asm-i386/fixmap.h
--- .23560-linux-2.6.17-rc4-git3/include/asm-i386/fixmap.h 2006-03-23 12:43:10.000000000 +1100
+++ .23560-linux-2.6.17-rc4-git3.updated/include/asm-i386/fixmap.h 2006-05-17 17:10:49.000000000 +1000
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+extern unsigned long __FIXADDR_TOP;
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
@@ -95,6 +95,8 @@ enum fixed_addresses {
extern void __set_fixmap (enum fixed_addresses idx,
unsigned long phys,...
2007 Apr 18
3
[patch] paravirt: VDSO page is essential
On Mon, 2007-03-05 at 13:06 +0100, Ingo Molnar wrote:
> Subject: [patch] paravirt: VDSO page is essential
> From: Ingo Molnar <mingo@elte.hu>
>
> commit 3bbf54725467d604698721384d858b5983b87e8f disables the VDSO for
> CONFIG_PARAVIRT kernels. This #ifdeffery was a bad change: the VDSO is
> an essential component of Linux, and this change forces all of them to
> use
2007 Apr 18
3
[patch] paravirt: VDSO page is essential
On Mon, 2007-03-05 at 13:06 +0100, Ingo Molnar wrote:
> Subject: [patch] paravirt: VDSO page is essential
> From: Ingo Molnar <mingo@elte.hu>
>
> commit 3bbf54725467d604698721384d858b5983b87e8f disables the VDSO for
> CONFIG_PARAVIRT kernels. This #ifdeffery was a bad change: the VDSO is
> an essential component of Linux, and this change forces all of them to
> use
2007 Apr 18
1
[PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch
...g-2.6.17-rc4-vsyscall-above-stack/include/asm-i386/fixmap.h
--- linux-2.6.17-rc4/include/asm-i386/fixmap.h 2006-03-23 12:43:10.000000000 +1100
+++ working-2.6.17-rc4-vsyscall-above-stack/include/asm-i386/fixmap.h 2006-05-16 14:24:47.000000000 +1000
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+extern unsigned long __FIXADDR_TOP;
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
@@ -52,7 +52,6 @@
*/
enum fixed_addresses {
FIX_HOLE,
- FIX_VSYSCALL,
#ifdef CONFIG_X86_LOCAL_APIC
FIX_APIC_BASE...
2007 Apr 18
1
[PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch
...g-2.6.17-rc4-vsyscall-above-stack/include/asm-i386/fixmap.h
--- linux-2.6.17-rc4/include/asm-i386/fixmap.h 2006-03-23 12:43:10.000000000 +1100
+++ working-2.6.17-rc4-vsyscall-above-stack/include/asm-i386/fixmap.h 2006-05-16 14:24:47.000000000 +1000
@@ -20,7 +20,7 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
-#define __FIXADDR_TOP 0xfffff000
+extern unsigned long __FIXADDR_TOP;
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
@@ -52,7 +52,6 @@
*/
enum fixed_addresses {
FIX_HOLE,
- FIX_VSYSCALL,
#ifdef CONFIG_X86_LOCAL_APIC
FIX_APIC_BASE...
2007 Apr 18
2
[RFC, PATCH] Fixup COMPAT_VDSO to work with CONFIG_PARAVIRT
...{
@@ -173,12 +171,8 @@ void reserve_top_address(unsigned long r
BUG_ON(fixmaps > 0);
printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
(int)-reserve);
-#ifdef CONFIG_COMPAT_VDSO
- BUG_ON(reserve !=3D 0);
-#else
__FIXADDR_TOP =3D -reserve - PAGE_SIZE;
__VMALLOC_RESERVE +=3D reserve;
-#endif
}
=
pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
Index: linux-2.6.21/include/asm-i386/elf.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3...
2007 Apr 18
2
[RFC, PATCH] Fixup COMPAT_VDSO to work with CONFIG_PARAVIRT
...{
@@ -173,12 +171,8 @@ void reserve_top_address(unsigned long r
BUG_ON(fixmaps > 0);
printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
(int)-reserve);
-#ifdef CONFIG_COMPAT_VDSO
- BUG_ON(reserve !=3D 0);
-#else
__FIXADDR_TOP =3D -reserve - PAGE_SIZE;
__VMALLOC_RESERVE +=3D reserve;
-#endif
}
=
pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
Index: linux-2.6.21/include/asm-i386/elf.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3...
2007 Apr 18
4
[patch 0/2] Updates to compat VDSOs
Hi Andi,
Here's a couple of patches to fix up COMPAT_VDSO:
The first is a straightforward implementation of Jan's original idea
of relocating the VDSO to match its mapped location. Unlike Jan and
Zach's version, I changed it to relocate based on the phdrs rather than
the sections; the result is pleasantly compact.
The second patch takes advantage of the fact that all the
2007 Apr 18
4
[patch 0/2] Updates to compat VDSOs
Hi Andi,
Here's a couple of patches to fix up COMPAT_VDSO:
The first is a straightforward implementation of Jan's original idea
of relocating the VDSO to match its mapped location. Unlike Jan and
Zach's version, I changed it to relocate based on the phdrs rather than
the sections; the result is pleasantly compact.
The second patch takes advantage of the fact that all the
2007 Apr 18
4
[patch 0/4] Clean up asm/bugs.h, identify_cpu() and update COMPAT_VDSO
Hi Andi,
Four patches:
- clean up asm/bugs.h, by moving all the C code into its own C file
- split identify_cpu() into boot and secondary variants, so that
boot-time setup functions can be marked __init
- repost of the COMPAT_VDSO patches with a bit more robustness from
unknown DT_tags, and functions marked __init, since all this is
boot-time only setup.
Thanks,
J
--