Mailing List Archive

# HG changeset patch
# User Keir Fraser <keir.fraser@citrix.com>
# Date 1273650779 -3600
# Node ID 21e3bc1c0ec2b08de8ec9853ea2627da956eae57
# Parent 4bf0ea1482238adbf943fe8e9cfb9b05ba0337ef
xl: Add command 'xl mem-max'

Add subcommand 'xl mem-max', can be used to set static max memory

Signed-off-by: Yu Zhiguo <yuzg@cn.fujitsu.com>
---
tools/libxl/libxl.c | 33 ++++++++++++++++++++++++++++
tools/libxl/libxl.h | 1
tools/libxl/xl_cmdimpl.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++
tools/libxl/xl_cmdimpl.h | 1
tools/libxl/xl_cmdtable.c | 5 ++++
5 files changed, 93 insertions(+)

diff -r 4bf0ea148223 -r 21e3bc1c0ec2 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c Wed May 12 08:52:30 2010 +0100
+++ b/tools/libxl/libxl.c Wed May 12 08:52:59 2010 +0100
@@ -2346,6 +2346,39 @@ int libxl_device_pci_shutdown(struct lib
return 0;
}

+int libxl_domain_setmaxmem(struct libxl_ctx *ctx, uint32_t domid, uint32_t max_memkb)
+{
+ char *mem, *endptr;
+ uint32_t memorykb;
+ char *dompath = libxl_xs_get_dompath(ctx, domid);
+ int rc;
+
+ mem = libxl_xs_read(ctx, XBT_NULL, libxl_sprintf(ctx, "%s/memory/target", dompath));
+ if (!mem) {
+ XL_LOG_ERRNO(ctx, XL_LOG_ERROR, "cannot get memory info from %s/memory/target\n", dompath);
+ return 1;
+ }
+ memorykb = strtoul(mem, &endptr, 10);
+ if (*endptr != '\0') {
+ XL_LOG_ERRNO(ctx, XL_LOG_ERROR, "invalid memory %s from %s/memory/target\n", mem, dompath);
+ return 1;
+ }
+
+ if (max_memkb < memorykb) {
+ XL_LOG_ERRNO(ctx, XL_LOG_ERROR, "memory_static_max must be greater than or or equal to memory_dynamic_max\n");
+ return 1;
+ }
+
+ rc = xc_domain_setmaxmem(ctx->xch, domid, max_memkb);
+ if (rc != 0)
+ return rc;
+
+ if (domid != 0)
+ libxl_xs_write(ctx, XBT_NULL, libxl_sprintf(ctx, "%s/memory/static-max", dompath), "%lu", max_memkb);
+
+ return rc;
+}
+
int libxl_set_memory_target(struct libxl_ctx *ctx, uint32_t domid, uint32_t target_memkb)
{
int rc = 0;
diff -r 4bf0ea148223 -r 21e3bc1c0ec2 tools/libxl/libxl.h
--- a/tools/libxl/libxl.h Wed May 12 08:52:30 2010 +0100
+++ b/tools/libxl/libxl.h Wed May 12 08:52:59 2010 +0100
@@ -339,6 +339,7 @@ int libxl_domain_pause(struct libxl_ctx
int libxl_domain_pause(struct libxl_ctx *ctx, uint32_t domid);
int libxl_domain_unpause(struct libxl_ctx *ctx, uint32_t domid);

+int libxl_domain_setmaxmem(struct libxl_ctx *ctx, uint32_t domid, uint32_t target_memkb);
int libxl_set_memory_target(struct libxl_ctx *ctx, uint32_t domid, uint32_t target_memkb);

int libxl_console_attach(struct libxl_ctx *ctx, uint32_t domid, int cons_num);
diff -r 4bf0ea148223 -r 21e3bc1c0ec2 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c Wed May 12 08:52:30 2010 +0100
+++ b/tools/libxl/xl_cmdimpl.c Wed May 12 08:52:59 2010 +0100
@@ -1187,6 +1187,59 @@ void help(char *command)
}
}

+int set_memory_max(char *p, char *mem)
+{
+ char *endptr;
+ uint32_t memorykb;
+ int rc;
+
+ find_domain(p);
+
+ memorykb = strtoul(mem, &endptr, 10);
+ if (*endptr != '\0') {
+ fprintf(stderr, "invalid memory size: %s\n", mem);
+ exit(3);
+ }
+
+ rc = libxl_domain_setmaxmem(&ctx, domid, memorykb);
+
+ return rc;
+}
+
+int main_memmax(int argc, char **argv)
+{
+ int opt = 0;
+ char *p = NULL, *mem;
+ int rc;
+
+ while ((opt = getopt(argc, argv, "h")) != -1) {
+ switch (opt) {
+ case 'h':
+ help("mem-max");
+ exit(0);
+ default:
+ fprintf(stderr, "option not supported\n");
+ break;
+ }
+ }
+ if (optind >= argc - 1) {
+ help("mem-max");
+ exit(2);
+ }
+
+ p = argv[optind];
+ mem = argv[optind + 1];
+
+ rc = set_memory_max(p, mem);
+ if (rc) {
+ fprintf(stderr, "cannot set domid %d static max memory to : %s\n", domid, mem);
+ exit(1);
+ }
+
+ printf("setting domid %d static max memory to : %s\n", domid, mem);
+ exit(0);
+}
+
void set_memory_target(char *p, char *mem)
{
char *endptr;
diff -r 4bf0ea148223 -r 21e3bc1c0ec2 tools/libxl/xl_cmdimpl.h
--- a/tools/libxl/xl_cmdimpl.h Wed May 12 08:52:30 2010 +0100
+++ b/tools/libxl/xl_cmdimpl.h Wed May 12 08:52:59 2010 +0100
@@ -33,6 +33,7 @@ int main_button_press(int argc, char **a
int main_button_press(int argc, char **argv);
int main_vcpupin(int argc, char **argv);
int main_vcpuset(int argc, char **argv);
+int main_memmax(int argc, char **argv);
int main_memset(int argc, char **argv);
int main_sched_credit(int argc, char **argv);
int main_domid(int argc, char **argv);
diff -r 4bf0ea148223 -r 21e3bc1c0ec2 tools/libxl/xl_cmdtable.c
--- a/tools/libxl/xl_cmdtable.c Wed May 12 08:52:30 2010 +0100
+++ b/tools/libxl/xl_cmdtable.c Wed May 12 08:52:59 2010 +0100
@@ -108,6 +108,11 @@ struct cmd_spec cmd_table[] = {
"Eject a cdrom from a guest's cd drive",
"<Domain> <VirtualDevice>",
},
+ { "mem-max",
+ &main_memmax,
+ "Set the maximum amount reservation for a domain",
+ "<Domain> <MemKB>",
+ },
{ "mem-set",
&main_memset,
"Set the current memory usage for a domain",

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