search for: kvmalloc_node

Displaying 20 results from an estimated 34 matches for "kvmalloc_node".

2017 Jan 04
2
GFP_REPEAT usage in vhost_net_open resp. vhost_vsock_dev_open
Hi Michael, I am currently cleaning up opencoded kmalloc with vmalloc fallback users [1] and my current kvmalloc_node helper doesn't support GFP_REPEAT because there are no users which would need it. At least that's what I thought until I've encountered vhost_vsock_dev_open resp. vhost_vsock_dev_open which are trying to use GFP_REPEAT for kmalloc. 23cc5a991c7a ("vhost-net: extend device allocation...
2017 Jan 04
2
GFP_REPEAT usage in vhost_net_open resp. vhost_vsock_dev_open
Hi Michael, I am currently cleaning up opencoded kmalloc with vmalloc fallback users [1] and my current kvmalloc_node helper doesn't support GFP_REPEAT because there are no users which would need it. At least that's what I thought until I've encountered vhost_vsock_dev_open resp. vhost_vsock_dev_open which are trying to use GFP_REPEAT for kmalloc. 23cc5a991c7a ("vhost-net: extend device allocation...
2018 Apr 18
7
[PATCH] net: don't use kvzalloc for DMA memory
On Wed, 18 Apr 2018, David Miller wrote: > From: Mikulas Patocka <mpatocka at redhat.com> > Date: Wed, 18 Apr 2018 12:44:25 -0400 (EDT) > > > The structure net_device is followed by arbitrary driver-specific data > > (accessible with the function netdev_priv). And for virtio-net, these > > driver-specific data must be in DMA memory. > > And we are saying
2018 Apr 24
2
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
On Mon 23-04-18 20:06:16, Mikulas Patocka wrote: [...] > @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f > */ > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > > +#ifdef CONFIG_DEBUG_SG > + /* Catch bugs when the caller uses DMA API on the result of kvmalloc. */ > + if (!(prandom_u32_max(2) & 1)) > + goto do_vmalloc; > +#endif I really...
2018 Apr 24
2
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
On Mon 23-04-18 20:06:16, Mikulas Patocka wrote: [...] > @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f > */ > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > > +#ifdef CONFIG_DEBUG_SG > + /* Catch bugs when the caller uses DMA API on the result of kvmalloc. */ > + if (!(prandom_u32_max(2) & 1)) > + goto do_vmalloc; > +#endif I really...
2018 Apr 19
2
[PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
...nges > kvmalloc to always use vmalloc if CONFIG_DEBUG_VM is turned on. > > ... > > --- linux-2.6.orig/mm/util.c 2018-04-18 15:46:23.000000000 +0200 > +++ linux-2.6/mm/util.c 2018-04-18 16:00:43.000000000 +0200 > @@ -395,6 +395,7 @@ EXPORT_SYMBOL(vm_mmap); > */ > void *kvmalloc_node(size_t size, gfp_t flags, int node) > { > +#ifndef CONFIG_DEBUG_VM > gfp_t kmalloc_flags = flags; > void *ret; > > @@ -426,6 +427,7 @@ void *kvmalloc_node(size_t size, gfp_t f > */ > if (ret || size <= PAGE_SIZE) > return ret; > +#endif > >...
2018 Apr 19
2
[PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
...nges > kvmalloc to always use vmalloc if CONFIG_DEBUG_VM is turned on. > > ... > > --- linux-2.6.orig/mm/util.c 2018-04-18 15:46:23.000000000 +0200 > +++ linux-2.6/mm/util.c 2018-04-18 16:00:43.000000000 +0200 > @@ -395,6 +395,7 @@ EXPORT_SYMBOL(vm_mmap); > */ > void *kvmalloc_node(size_t size, gfp_t flags, int node) > { > +#ifndef CONFIG_DEBUG_VM > gfp_t kmalloc_flags = flags; > void *ret; > > @@ -426,6 +427,7 @@ void *kvmalloc_node(size_t size, gfp_t f > */ > if (ret || size <= PAGE_SIZE) > return ret; > +#endif > >...
2018 Apr 19
1
[PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
...linux-2.6/mm/util.c > =================================================================== > --- linux-2.6.orig/mm/util.c 2018-04-18 15:46:23.000000000 +0200 > +++ linux-2.6/mm/util.c 2018-04-18 16:00:43.000000000 +0200 > @@ -395,6 +395,7 @@ EXPORT_SYMBOL(vm_mmap); > */ > void *kvmalloc_node(size_t size, gfp_t flags, int node) > { > +#ifndef CONFIG_DEBUG_VM > gfp_t kmalloc_flags = flags; > void *ret; > > @@ -426,6 +427,7 @@ void *kvmalloc_node(size_t size, gfp_t f > */ > if (ret || size <= PAGE_SIZE) > return ret; > +#endif > >...
2018 Apr 19
1
[PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
...gt; > > > > ... > > > > > > --- linux-2.6.orig/mm/util.c 2018-04-18 15:46:23.000000000 +0200 > > > +++ linux-2.6/mm/util.c 2018-04-18 16:00:43.000000000 +0200 > > > @@ -395,6 +395,7 @@ EXPORT_SYMBOL(vm_mmap); > > > */ > > > void *kvmalloc_node(size_t size, gfp_t flags, int node) > > > { > > > +#ifndef CONFIG_DEBUG_VM > > > gfp_t kmalloc_flags = flags; > > > void *ret; > > > > > > @@ -426,6 +427,7 @@ void *kvmalloc_node(size_t size, gfp_t f > > > */ > > >...
2018 Apr 24
2
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
On Tue 24-04-18 11:50:30, Mikulas Patocka wrote: > > > On Tue, 24 Apr 2018, Michal Hocko wrote: > > > On Mon 23-04-18 20:06:16, Mikulas Patocka wrote: > > [...] > > > @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f > > > */ > > > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > > > > > > +#ifdef CONFIG_DEBUG_SG > > > + /* Catch bugs when the caller uses DMA API on the result of kvmalloc. */ > > > + if (!(prandom_u32_max(2...
2018 Apr 24
2
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
On Tue 24-04-18 11:50:30, Mikulas Patocka wrote: > > > On Tue, 24 Apr 2018, Michal Hocko wrote: > > > On Mon 23-04-18 20:06:16, Mikulas Patocka wrote: > > [...] > > > @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f > > > */ > > > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > > > > > > +#ifdef CONFIG_DEBUG_SG > > > + /* Catch bugs when the caller uses DMA API on the result of kvmalloc. */ > > > + if (!(prandom_u32_max(2...
2018 Apr 25
0
[PATCH v5] fault-injection: introduce kvmalloc fallback options
...oid) > > +{ > > + fault_create_debugfs_attr("kvmalloc_fallback", NULL, &kvmalloc_fallback); > > + return 0; > > +} > > +late_initcall(kvmalloc_fallback_debugfs_init); > > +#endif > > + > > +#endif > > + > > /** > > * kvmalloc_node - attempt to allocate physically contiguous memory, but upon > > * failure, fall back to non-contiguous (vmalloc) allocation. > > @@ -404,6 +428,11 @@ void *kvmalloc_node(size_t size, gfp_t f > > */ > > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > >...
2018 Apr 25
0
[PATCH v5] fault-injection: introduce kvmalloc fallback options
...alloc_fallback); + +#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS +static int __init kvmalloc_fallback_debugfs_init(void) +{ + fault_create_debugfs_attr("kvmalloc_fallback", NULL, &kvmalloc_fallback); + return 0; +} +late_initcall(kvmalloc_fallback_debugfs_init); +#endif + +#endif + /** * kvmalloc_node - attempt to allocate physically contiguous memory, but upon * failure, fall back to non-contiguous (vmalloc) allocation. @@ -404,6 +428,11 @@ void *kvmalloc_node(size_t size, gfp_t f */ WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); +#ifdef CONFIG_FAULT_INJECTION + if (should_fail(...
2018 Apr 24
2
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
...On Tue 24-04-18 11:50:30, Mikulas Patocka wrote: > > > > > > > > > On Tue, 24 Apr 2018, Michal Hocko wrote: > > > > > > > On Mon 23-04-18 20:06:16, Mikulas Patocka wrote: > > > > [...] > > > > > @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f > > > > > */ > > > > > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > > > > > > > > > > +#ifdef CONFIG_DEBUG_SG > > > > > + /* Catch bugs when the caller uses DMA API on the result of kvm...
2018 Apr 24
2
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
...On Tue 24-04-18 11:50:30, Mikulas Patocka wrote: > > > > > > > > > On Tue, 24 Apr 2018, Michal Hocko wrote: > > > > > > > On Mon 23-04-18 20:06:16, Mikulas Patocka wrote: > > > > [...] > > > > > @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f > > > > > */ > > > > > WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); > > > > > > > > > > +#ifdef CONFIG_DEBUG_SG > > > > > + /* Catch bugs when the caller uses DMA API on the result of kvm...
2018 Apr 25
0
[PATCH v4] fault-injection: introduce kvmalloc fallback options
...alloc_fallback); + +#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS +static int __init kvmalloc_fallback_debugfs_init(void) +{ + fault_create_debugfs_attr("kvmalloc_fallback", NULL, &kvmalloc_fallback); + return 0; +} +late_initcall(kvmalloc_fallback_debugfs_init); +#endif + +#endif + /** * kvmalloc_node - attempt to allocate physically contiguous memory, but upon * failure, fall back to non-contiguous (vmalloc) allocation. @@ -404,6 +428,11 @@ void *kvmalloc_node(size_t size, gfp_t f */ WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); +#ifdef CONFIG_FAULT_INJECTION + if (should_fail(...
2017 Jan 04
0
GFP_REPEAT usage in vhost_net_open resp. vhost_vsock_dev_open
On Wed, Jan 04, 2017 at 04:08:00PM +0100, Michal Hocko wrote: > Hi Michael, > I am currently cleaning up opencoded kmalloc with vmalloc fallback users > [1] and my current kvmalloc_node helper doesn't support GFP_REPEAT > because there are no users which would need it. At least that's what I > thought until I've encountered vhost_vsock_dev_open resp. > vhost_vsock_dev_open which are trying to use GFP_REPEAT for kmalloc. > 23cc5a991c7a ("vhost-net: exte...
2018 Apr 19
0
[PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
...anged, 2 insertions(+) Index: linux-2.6/mm/util.c =================================================================== --- linux-2.6.orig/mm/util.c 2018-04-18 15:46:23.000000000 +0200 +++ linux-2.6/mm/util.c 2018-04-18 16:00:43.000000000 +0200 @@ -395,6 +395,7 @@ EXPORT_SYMBOL(vm_mmap); */ void *kvmalloc_node(size_t size, gfp_t flags, int node) { +#ifndef CONFIG_DEBUG_VM gfp_t kmalloc_flags = flags; void *ret; @@ -426,6 +427,7 @@ void *kvmalloc_node(size_t size, gfp_t f */ if (ret || size <= PAGE_SIZE) return ret; +#endif return __vmalloc_node_flags_caller(size, node, flags, __...
2018 Apr 19
0
[PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
...if CONFIG_DEBUG_VM is turned on. > > > > ... > > > > --- linux-2.6.orig/mm/util.c 2018-04-18 15:46:23.000000000 +0200 > > +++ linux-2.6/mm/util.c 2018-04-18 16:00:43.000000000 +0200 > > @@ -395,6 +395,7 @@ EXPORT_SYMBOL(vm_mmap); > > */ > > void *kvmalloc_node(size_t size, gfp_t flags, int node) > > { > > +#ifndef CONFIG_DEBUG_VM > > gfp_t kmalloc_flags = flags; > > void *ret; > > > > @@ -426,6 +427,7 @@ void *kvmalloc_node(size_t size, gfp_t f > > */ > > if (ret || size <= PAGE_SIZE) > &g...
2018 Apr 24
0
[PATCH v3] kvmalloc: always use vmalloc if CONFIG_DEBUG_SG
...m/util.c 2018-04-23 17:57:02.000000000 +0200 @@ -14,6 +14,7 @@ #include <linux/hugetlb.h> #include <linux/vmalloc.h> #include <linux/userfaultfd_k.h> +#include <linux/random.h> #include <asm/sections.h> #include <linux/uaccess.h> @@ -404,6 +405,12 @@ void *kvmalloc_node(size_t size, gfp_t f */ WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL); +#ifdef CONFIG_DEBUG_SG + /* Catch bugs when the caller uses DMA API on the result of kvmalloc. */ + if (!(prandom_u32_max(2) & 1)) + goto do_vmalloc; +#endif + /* * We want to attempt a large physically...