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Index: sys/compat/linprocfs/linprocfs.c
===================================================================
--- sys/compat/linprocfs/linprocfs.c
+++ sys/compat/linprocfs/linprocfs.c
@@ -80,6 +80,7 @@
#include <sys/vmmeter.h>
#include <sys/vnode.h>
#include <sys/bus.h>
+#include <sys/uio.h>
#include <net/if.h>
#include <net/if_var.h>
@@ -104,6 +105,7 @@
#endif /* __i386__ || __amd64__ */
#include <compat/linux/linux.h>
+#include <compat/linux/linux_emul.h>
#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_util.h>
@@ -1932,6 +1934,33 @@
return (error);
}
+/*
+ * Filler function for proc/self/oom_score_adj
+ *
+ */
+static int
+linprocfs_dooomscoreadj(PFS_FILL_ARGS)
+{
+ struct linux_pemuldata *pem;
+ long oom;
+
+ pem = pem_find(p);
+ if (pem == NULL || uio == NULL)
+ return (EOPNOTSUPP);
+ if (uio->uio_rw == UIO_READ) {
+ sbuf_printf(sb, "%d\n", pem->oom_score_adj);
+ } else {
+ sbuf_trim(sb);
+ sbuf_finish(sb);
+ oom = strtol(sbuf_data(sb), NULL, 10);
+ if (oom < LINUX_OOM_SCORE_ADJ_MIN ||
+ oom > LINUX_OOM_SCORE_ADJ_MAX)
+ return (EINVAL);
+ pem->oom_score_adj = oom;
+ }
+ return (0);
+}
+
/*
* Constructor
*/
@@ -2018,6 +2047,8 @@
NULL, &procfs_candebug, NULL, PFS_RD|PFS_RAWRD);
pfs_create_file(dir, "limits", &linprocfs_doproclimits,
NULL, NULL, NULL, PFS_RD);
+ pfs_create_file(dir, "oom_score_adj", &linprocfs_dooomscoreadj,
+ procfs_attr_rw, &procfs_candebug, NULL, PFS_RDWR);
/* /proc/<pid>/task/... */
dir = pfs_create_dir(dir, "task", linprocfs_dotaskattr, NULL, NULL, 0);
Index: sys/compat/linux/linux_emul.h
===================================================================
--- sys/compat/linux/linux_emul.h
+++ sys/compat/linux/linux_emul.h
@@ -75,6 +75,7 @@
struct sx pem_sx; /* lock for this struct */
uint32_t persona; /* process execution domain */
uint32_t ptrace_flags; /* used by ptrace(2) */
+ uint32_t oom_score_adj; /* /proc/self/oom_score_adj */
};
#define LINUX_PEM_XLOCK(p) sx_xlock(&(p)->pem_sx)
Index: sys/compat/linux/linux_emul.c
===================================================================
--- sys/compat/linux/linux_emul.c
+++ sys/compat/linux/linux_emul.c
@@ -163,6 +163,7 @@
pem = malloc(sizeof(*pem), M_LINUX, M_WAITOK | M_ZERO);
sx_init(&pem->pem_sx, "lpemlk");
p->p_emuldata = pem;
+ pem->oom_score_adj = LINUX_OOM_SCORE_ADJ_MAX;
}
newtd->td_emuldata = em;
@@ -187,6 +188,7 @@
pem = pem_find(p);
KASSERT(pem != NULL, ("proc_exit: proc emuldata not found.\n"));
pem->persona = 0;
+ pem->oom_score_adj = LINUX_OOM_SCORE_ADJ_MAX;
}
}
Index: sys/compat/linux/linux_misc.h
===================================================================
--- sys/compat/linux/linux_misc.h
+++ sys/compat/linux/linux_misc.h
@@ -157,6 +157,10 @@
/* Linux seccomp flags */
#define LINUX_SECCOMP_GET_ACTION_AVAIL 2
+/* Linux /proc/self/oom_score_adj */
+#define LINUX_OOM_SCORE_ADJ_MIN -1000
+#define LINUX_OOM_SCORE_ADJ_MAX 1000
+
#if defined(__aarch64__) || (defined(__amd64__) && !defined(COMPAT_LINUX32))
int linux_ptrace_status(struct thread *td, int pid, int status);
#endif

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