Date: Sat, 30 Dec 2023 06:18:57 GMT From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 1b8d70b2eb71 - main - kern: Introduce kern.pid_max_limit sysctl. Message-ID: <202312300618.3BU6Ivbt097465@gitrepo.freebsd.org>
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The branch main has been updated by pjd: URL: https://cgit.FreeBSD.org/src/commit/?id=1b8d70b2eb713f5c75605419bb2505ce18fa304a commit 1b8d70b2eb713f5c75605419bb2505ce18fa304a Author: Pawel Jakub Dawidek <pjd@FreeBSD.org> AuthorDate: 2023-12-30 06:15:17 +0000 Commit: Pawel Jakub Dawidek <pjd@FreeBSD.org> CommitDate: 2023-12-30 06:15:17 +0000 kern: Introduce kern.pid_max_limit sysctl. The kern.pid_max_limit will hold the PID_MAX value the kernel was compiled with. The existing kern.pid_max sysctl can be modified and doesn't really represent maximum PID number in the system, as there may still be processes created with higher PIDs before kern.pid_max was lowered. Reivewed by: kib, zlei Approved by: oshogbo Differential Revision: https://reviews.freebsd.org/D43077 --- sys/kern/kern_mib.c | 4 ++++ sys/sys/proc.h | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/kern/kern_mib.c b/sys/kern/kern_mib.c index 5a95e3454ff2..b7a801cd53c0 100644 --- a/sys/kern/kern_mib.c +++ b/sys/kern/kern_mib.c @@ -754,6 +754,10 @@ SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); +SYSCTL_INT(_kern, OID_AUTO, pid_max_limit, CTLFLAG_RD, + SYSCTL_NULL_INT_PTR, PID_MAX, + "Maximum allowed pid (kern.pid_max) top limit"); + #include <sys/bio.h> #include <sys/buf.h> SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, diff --git a/sys/sys/proc.h b/sys/sys/proc.h index e7d2a1775603..33a878dc46aa 100644 --- a/sys/sys/proc.h +++ b/sys/sys/proc.h @@ -955,7 +955,7 @@ MALLOC_DECLARE(M_SUBPROC); * in a pid_t, as it is used to represent "no process group". */ #define PID_MAX 99999 -#define NO_PID 100000 +#define NO_PID (PID_MAX + 1) #define THREAD0_TID NO_PID extern pid_t pid_max;
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