diff options
Diffstat (limited to 'sys/kern/subr_param.c')
| -rw-r--r-- | sys/kern/subr_param.c | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/sys/kern/subr_param.c b/sys/kern/subr_param.c index 421bd37..2ca0051 100644 --- a/sys/kern/subr_param.c +++ b/sys/kern/subr_param.c @@ -93,6 +93,7 @@ int ncallout; /* maximum # of timer events */ int nbuf; int ngroups_max; /* max # groups per process */ int nswbuf; +quad_t maxmbufmem; /* max mbuf memory */ pid_t pid_max = PID_MAX; long maxswzone; /* max swmeta KVA storage */ long maxbcache; /* max buffer cache KVA storage */ @@ -271,6 +272,7 @@ init_param1(void) void init_param2(long physpages) { + quad_t realmem; /* Base parameters */ maxusers = MAXUSERS; @@ -294,19 +296,25 @@ init_param2(long physpages) /* * The following can be overridden after boot via sysctl. Note: * unless overriden, these macros are ultimately based on maxusers. - */ - maxproc = NPROC; - TUNABLE_INT_FETCH("kern.maxproc", &maxproc); - /* * Limit maxproc so that kmap entries cannot be exhausted by * processes. */ + maxproc = NPROC; + TUNABLE_INT_FETCH("kern.maxproc", &maxproc); if (maxproc > (physpages / 12)) maxproc = physpages / 12; - maxfiles = MAXFILES; - TUNABLE_INT_FETCH("kern.maxfiles", &maxfiles); maxprocperuid = (maxproc * 9) / 10; - maxfilesperproc = (maxfiles * 9) / 10; + + /* + * The default limit for maxfiles is 1/12 of the number of + * physical page but not less than 16 times maxusers. + * At most it can be 1/6 the number of physical pages. + */ + maxfiles = imax(MAXFILES, physpages / 8); + TUNABLE_INT_FETCH("kern.maxfiles", &maxfiles); + if (maxfiles > (physpages / 4)) + maxfiles = physpages / 4; + maxfilesperproc = (maxfiles / 10) * 9; /* * Cannot be changed after boot. @@ -314,20 +322,35 @@ init_param2(long physpages) nbuf = NBUF; TUNABLE_INT_FETCH("kern.nbuf", &nbuf); + /* + * XXX: Does the callout wheel have to be so big? + */ ncallout = 16 + maxproc + maxfiles; TUNABLE_INT_FETCH("kern.ncallout", &ncallout); /* + * The default limit for all mbuf related memory is 1/2 of all + * available kernel memory (physical or kmem). + * At most it can be 3/4 of available kernel memory. + */ + realmem = qmin(physpages * PAGE_SIZE, + VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS); + maxmbufmem = realmem / 2; + TUNABLE_QUAD_FETCH("kern.maxmbufmem", &maxmbufmem); + if (maxmbufmem > (realmem / 4) * 3) + maxmbufmem = (realmem / 4) * 3; + + /* * The default for maxpipekva is min(1/64 of the kernel address space, * max(1/64 of main memory, 512KB)). See sys_pipe.c for more details. */ maxpipekva = (physpages / 64) * PAGE_SIZE; + TUNABLE_LONG_FETCH("kern.ipc.maxpipekva", &maxpipekva); if (maxpipekva < 512 * 1024) maxpipekva = 512 * 1024; if (maxpipekva > (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 64) maxpipekva = (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 64; - TUNABLE_LONG_FETCH("kern.ipc.maxpipekva", &maxpipekva); } /* |
