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| author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2014-06-28 03:56:17 +0000 |
|---|---|---|
| committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2014-06-28 03:56:17 +0000 |
| commit | af3b2549c4ba2ef00a7cbb4cb6836598bf0aefbe (patch) | |
| tree | 2ebc46d89e79d747fa284f379b1979658216c719 /sys/kern/sysv_shm.c | |
| parent | b152235544f6d8515906c119c210fbd77827b511 (diff) | |
| download | src-af3b2549c4ba2ef00a7cbb4cb6836598bf0aefbe.tar.gz src-af3b2549c4ba2ef00a7cbb4cb6836598bf0aefbe.zip | |
Notes
Diffstat (limited to 'sys/kern/sysv_shm.c')
| -rw-r--r-- | sys/kern/sysv_shm.c | 32 |
1 files changed, 13 insertions, 19 deletions
diff --git a/sys/kern/sysv_shm.c b/sys/kern/sysv_shm.c index 4144d9431f9d..a7a7c167e550 100644 --- a/sys/kern/sysv_shm.c +++ b/sys/kern/sysv_shm.c @@ -156,29 +156,29 @@ static int sysctl_shmsegs(SYSCTL_HANDLER_ARGS); #endif struct shminfo shminfo = { - SHMMAX, - SHMMIN, - SHMMNI, - SHMSEG, - SHMALL + .shmmax = SHMMAX, + .shmmin = SHMMIN, + .shmmni = SHMMNI, + .shmseg = SHMSEG, + .shmall = SHMALL }; static int shm_use_phys; static int shm_allow_removed; -SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmmax, CTLFLAG_RW, &shminfo.shmmax, 0, +SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmmax, CTLFLAG_RWTUN, &shminfo.shmmax, 0, "Maximum shared memory segment size"); -SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmmin, CTLFLAG_RW, &shminfo.shmmin, 0, +SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmmin, CTLFLAG_RWTUN, &shminfo.shmmin, 0, "Minimum shared memory segment size"); SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmmni, CTLFLAG_RDTUN, &shminfo.shmmni, 0, "Number of shared memory identifiers"); SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmseg, CTLFLAG_RDTUN, &shminfo.shmseg, 0, "Number of segments per process"); -SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmall, CTLFLAG_RW, &shminfo.shmall, 0, +SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmall, CTLFLAG_RWTUN, &shminfo.shmall, 0, "Maximum number of pages available for shared memory"); -SYSCTL_INT(_kern_ipc, OID_AUTO, shm_use_phys, CTLFLAG_RW, +SYSCTL_INT(_kern_ipc, OID_AUTO, shm_use_phys, CTLFLAG_RWTUN, &shm_use_phys, 0, "Enable/Disable locking of shared memory pages in core"); -SYSCTL_INT(_kern_ipc, OID_AUTO, shm_allow_removed, CTLFLAG_RW, +SYSCTL_INT(_kern_ipc, OID_AUTO, shm_allow_removed, CTLFLAG_RWTUN, &shm_allow_removed, 0, "Enable/Disable attachment to attached segments marked for removal"); SYSCTL_PROC(_kern_ipc, OID_AUTO, shmsegs, CTLTYPE_OPAQUE | CTLFLAG_RD, @@ -887,20 +887,14 @@ shminit() if (TUNABLE_ULONG_FETCH("kern.ipc.shmmaxpgs", &shminfo.shmall) != 0) printf("kern.ipc.shmmaxpgs is now called kern.ipc.shmall!\n"); #endif - TUNABLE_ULONG_FETCH("kern.ipc.shmall", &shminfo.shmall); - if (!TUNABLE_ULONG_FETCH("kern.ipc.shmmax", &shminfo.shmmax)) { + if (shminfo.shmmax == SHMMAX) { /* Initialize shmmax dealing with possible overflow. */ - for (i = PAGE_SIZE; i > 0; i--) { + for (i = PAGE_SIZE; i != 0; i--) { shminfo.shmmax = shminfo.shmall * i; - if (shminfo.shmmax >= shminfo.shmall) + if ((shminfo.shmmax / shminfo.shmall) == (u_long)i) break; } } - TUNABLE_ULONG_FETCH("kern.ipc.shmmin", &shminfo.shmmin); - TUNABLE_ULONG_FETCH("kern.ipc.shmmni", &shminfo.shmmni); - TUNABLE_ULONG_FETCH("kern.ipc.shmseg", &shminfo.shmseg); - TUNABLE_INT_FETCH("kern.ipc.shm_use_phys", &shm_use_phys); - shmalloced = shminfo.shmmni; shmsegs = malloc(shmalloced * sizeof(shmsegs[0]), M_SHM, M_WAITOK); for (i = 0; i < shmalloced; i++) { |