I want to warn the user right away that the configuration is messed up and
that "reserved=off" is not effective.
For anonymous memory, "reserved=off" will start really being useful when
having a way to dynamically reserve swap space.
I think it's fine to have that early failure, it just seems
On Wed, Mar 03, 2021 at 11:14:10AM +0100, David Hildenbrand wrote:
> On 02.03.21 22:44, Peter Xu wrote:
> > On Tue, Mar 02, 2021 at 08:01:11PM +0100, David Hildenbrand wrote:
> > > On 02.03.21 18:51, Peter Xu wrote:
> > > > On Tue, Feb 09, 2021 at 02:49:38PM +0100, David Hildenbrand wrote:
> > > >
On 02.03.21 22:44, Peter Xu wrote:
On Tue, Mar 02, 2021 at 08:01:11PM +0100, David Hildenbrand wrote:
On 02.03.21 18:51, Peter Xu wrote:
On Tue, Feb 09, 2021 at 02:49:38PM +0100, David Hildenbrand wrote:
+#define OVERCOMMIT_MEMORY_PATH "/proc/sys/vm/overcommit_memory"
+static bool map_noreserv
On Tue, Mar 02, 2021 at 08:01:11PM +0100, David Hildenbrand wrote:
> On 02.03.21 18:51, Peter Xu wrote:
> > On Tue, Feb 09, 2021 at 02:49:38PM +0100, David Hildenbrand wrote:
> > > +#define OVERCOMMIT_MEMORY_PATH "/proc/sys/vm/overcommit_memory"
> > > +static bool map_noreserve_effective(int fd, bo
On 02.03.21 18:51, Peter Xu wrote:
On Tue, Feb 09, 2021 at 02:49:38PM +0100, David Hildenbrand wrote:
+#define OVERCOMMIT_MEMORY_PATH "/proc/sys/vm/overcommit_memory"
+static bool map_noreserve_effective(int fd, bool shared)
+{
+#if defined(__linux__)
+gchar *content = NULL;
+const char
On Tue, Feb 09, 2021 at 02:49:38PM +0100, David Hildenbrand wrote:
> +#define OVERCOMMIT_MEMORY_PATH "/proc/sys/vm/overcommit_memory"
> +static bool map_noreserve_effective(int fd, bool shared)
> +{
> +#if defined(__linux__)
> +gchar *content = NULL;
> +const char *endptr;
> +unsigned i
Let's support RAM_NORESERVE via MAP_NORESERVE. At least on Linux,
the flag has no effect on shared mappings - except for anonymous memory
and hugetlbfs.
Linux man page:
"MAP_NORESERVE: Do not reserve swap space for this mapping. When swap
space is reserved, one has the guarantee that it is pos
