Messages in this thread |  | | Date | Mon, 05 Feb 2001 11:03:26 -0800 | From | Dan Kegel <> | Subject | Re: No buffer space available?? |
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Mathieu Dube wrote: > when accept return -1 perror gives me "No buffer space available" > What do you think that means??
Better ask a real net guru :-) Or look at the sources.
in /usr/src/linux/net/ipv4/af_inet.c
int inet_create() { ... sk = sk_alloc(PF_INET, GFP_KERNEL, 1); if (sk == NULL) goto do_oom; ... do_oom: return -ENOBUFS;
in /usr/src/linux/net/core/sock.c
/* * All socket objects are allocated here. This is for future * usage. */ struct sock *sk_alloc(int family, int priority, int zero_it) { struct sock *sk = kmem_cache_alloc(sk_cachep, priority); if(sk) { if (zero_it) memset(sk, 0, sizeof(struct sock)); sk->family = family; } return sk; }
void __init sk_init(void) { sk_cachep = kmem_cache_create("sock", sizeof(struct sock), 0, SLAB_HWCACHE_ALIGN, 0, 0); }
Poking around a little in mm/slab.c, I see that the name passed to kmem_cache_create is used in generating the /proc/slabinfo report, so cat /proc/slabinfo | grep sock shows you some info. On my system, it prints two numbers, from len += sprintf(buf+len, "%-17s %6lu %6lu\n", cachep->c_name, active_objs, num_objs); which tells you how many sockets are allocated. Dunno how useful that is.
Like I said, you'll have to ask a real guru :-)
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