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Use libuv functions to get memory available to BIND 9

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This change uses uv_get_total_memory() to get the memory available to
BIND 9 with possible modification by uv_get_constrained_memory() if the
libuv version is recent enough to honour constraints created by
f.e. cgroups.
This commit is contained in:
Ondřej Surý
2024-09-20 09:10:20 +02:00
committed by Ondřej Surý
parent 0d0d61ce3c
commit 06e5ada4be
1 changed files with 8 additions and 32 deletions
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40
lib/isc/meminfo.c
View File

@@ -12,42 +12,18 @@
*/
#include <inttypes.h>
#include <sys/param.h>
#include <sys/types.h>
#include <unistd.h>
#if HAVE_SYS_SYSCTL_H && !defined(__linux__)
#include <sys/sysctl.h>
#endif
#include <isc/meminfo.h>
#include <isc/uv.h>
uint64_t
isc_meminfo_totalphys(void) {
#if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE))
int mib[2];
mib[0] = CTL_HW;
#if defined(HW_MEMSIZE)
mib[1] = HW_MEMSIZE;
#elif defined(HW_PHYSMEM64)
mib[1] = HW_PHYSMEM64;
#endif /* if defined(HW_MEMSIZE) */
uint64_t size = 0;
size_t len = sizeof(size);
if (sysctl(mib, 2, &size, &len, NULL, 0) == 0) {
return (size);
uint64_t tmem = uv_get_total_memory();
#if UV_VERSION_HEX >= UV_VERSION(1, 29, 0)
uint64_t cmem = uv_get_constrained_memory();
if (cmem > 0 && cmem < tmem) {
return (cmem);
}
#endif /* if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE)) \
* */
#if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
long pages = sysconf(_SC_PHYS_PAGES);
long pagesize = sysconf(_SC_PAGESIZE);
if (pages < 0 || pagesize < 0) {
return (0);
}
return ((uint64_t)pages * pagesize);
#endif /* if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE) */
return (0);
#endif /* UV_VERSION_HEX >= UV_VERSION(1, 29, 0) */
return (tmem);
}