Herbert Xu 07ee0722bf rhashtable: Add cap on number of elements in hash table ... We currently have no limit on the number of elements in a hash table. This is a problem because some users (tipc) set a ceiling on the maximum table size and when that is reached the hash table may degenerate. Others may encounter OOM when growing and if we allow insertions when that happens the hash table perofrmance may also suffer. This patch adds a new paramater insecure_max_entries which becomes the cap on the table. If unset it defaults to max_size * 2. If it is also zero it means that there is no cap on the number of elements in the table. However, the table will grow whenever the utilisation hits 100% and if that growth fails, you will get ENOMEM on insertion. As allowing oversubscription is potentially dangerous, the name contains the word insecure. Note that the cap is not a hard limit. This is done for performance reasons as enforcing a hard limit will result in use of atomic ops that are heavier than the ones we currently use. The reasoning is that we're only guarding against a gross over- subscription of the table, rather than a small breach of the limit. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-05-16 18:08:26 -04:00
..
fonts	fonts: Add 6x10 font	2014-10-09 11:35:48 +03:00
lz4	lib/lz4: Pull out constant tables	2015-03-25 15:04:57 +01:00
lzo	lzo: check for length overrun in variable length encoding.	2014-09-28 11:08:01 +02:00
mpi	MPILIB: Fix comparison of negative MPIs	2015-01-14 16:10:12 +00:00
raid6	md/raid6 algorithms: xor_syndrome() for SSE2	2015-04-22 08:00:42 +10:00
reed_solomon
xz	lib/xz: enable all filters by default in Kconfig	2014-06-04 16:54:18 -07:00
zlib_deflate	zlib: clean up some dead code	2014-08-06 18:01:24 -07:00
zlib_inflate	zlib: clean up some dead code	2014-08-06 18:01:24 -07:00
.gitignore
argv_split.c
asn1_decoder.c	lib/asn1_decoder.c: kernel-doc warning fix	2014-06-04 16:54:19 -07:00
assoc_array.c	assoc_array: Include rcupdate.h for call_rcu() definition	2015-01-07 16:08:41 +00:00
atomic64.c	locking,arch: Rewrite generic atomic support	2014-08-14 12:48:14 +02:00
atomic64_test.c	lib/atomic64_test.c: convert printk(KERN_INFO to pr_info	2014-06-04 16:54:19 -07:00
audit.c	syscalls: implement execveat() system call	2014-12-13 12:42:51 -08:00
average.c
bcd.c
bch.c
bitmap.c	lib/bitmap.c: bitmap_[empty,full]: remove code duplication	2015-04-17 09:03:56 -04:00
bitrev.c	ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction	2014-12-22 16:43:06 +00:00
bsearch.c
btree.c	lib/btree.c: fix leak of whole btree nodes	2014-06-04 16:54:18 -07:00
bug.c	lib/bug: Use RCU list ops for module_bug_list	2014-11-11 17:07:46 +10:30
build_OID_registry
bust_spinlocks.c
check_signature.c
checksum.c	lib/checksum.c: fix build for generic csum_tcpudp_nofold	2015-01-29 11:57:38 -08:00
clz_ctz.c
clz_tab.c
cmdline.c	lib: Add a generic cmdline parse function parse_option_str	2014-10-03 18:40:58 +01:00
compat_audit.c
cordic.c
cpu-notifier-error-inject.c
cpu_rmap.c
cpumask.c	This is the final removal (after several years!) of the obsolete cpus_*	2015-04-20 10:19:03 -07:00
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c
crc7.c	lib/crc7: Shift crc7() output left 1 bit	2014-05-16 14:26:52 -04:00
crc8.c
crc16.c
crc32.c	lib: crc32: Add some additional __pure annotations	2014-06-25 16:04:00 -07:00
crc32defs.h
ctype.c
debug_locks.c
debugobjects.c	lib/debugobjects.c: convert printk(KERN_DEBUG to pr_debug	2014-06-04 16:53:53 -07:00
dec_and_lock.c
decompress.c	lib/decompress.c: consistency of compress formats for kernel image	2014-12-13 12:42:52 -08:00
decompress_bunzip2.c	decompress_bunzip2: off by one in get_next_block()	2014-12-13 12:42:52 -08:00
decompress_inflate.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unlz4.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unlzma.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unlzo.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unxz.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
devres.c	lib: devres: add a helper function for ioremap_wc	2015-03-16 21:11:32 +01:00
digsig.c	lib/digsig.c: kernel-doc warning fixes	2014-06-04 16:54:19 -07:00
div64.c	lib: correct link to the original source for div64_u64	2015-03-06 23:19:27 +01:00
dma-debug.c	lib/dma-debug: fix bucket_find_contain()	2015-04-17 09:03:54 -04:00
dump_stack.c	asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*	2014-05-05 16:07:46 -07:00
dynamic_debug.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-02-10 18:57:15 -08:00
dynamic_queue_limits.c	lib/dynamic_queue_limits.c: simplify includes	2015-02-12 18:54:15 -08:00
earlycpio.c
extable.c
fault-inject.c	fault-inject: add ratelimit option	2014-12-13 12:42:52 -08:00
fdt.c
fdt_empty_tree.c	lib: add fdt_empty_tree.c	2014-04-30 19:49:37 +01:00
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
find_bit.c	lib: rename lib/find_next_bit.c to lib/find_bit.c	2015-04-17 09:03:54 -04:00
flex_array.c
flex_proportions.c	proportions: add @gfp to init functions	2014-09-08 09:51:30 +09:00
gcd.c
gen_crc32table.c	lib: crc32: constify crc32 lookup table	2015-02-13 21:21:35 -08:00
genalloc.c	lib/genalloc.c: check result of devres_alloc()	2015-02-13 21:21:36 -08:00
glob.c	lib/glob.c: add CONFIG_GLOB_SELFTEST	2014-08-06 18:01:25 -07:00
halfmd4.c	lib/halfmd4.c: simplify includes	2015-02-12 18:54:15 -08:00
hexdump.c	hexdump: make it return number of bytes placed in buffer	2015-02-12 18:54:15 -08:00
hweight.c	Make ARCH_HAS_FAST_MULTIPLIER a real config variable	2014-09-13 11:14:53 -07:00
idr.c	lib/idr.c: remove redundant include	2015-02-12 18:54:15 -08:00
inflate.c
int_sqrt.c
interval_tree.c	lib/interval_tree.c: simplify includes	2015-02-12 18:54:15 -08:00
interval_tree_test.c	lib: Export interval_tree	2014-05-05 09:09:14 +02:00
iomap.c
iomap_copy.c
iommu-common.c	iommu-common: rename iommu_pool_hash to iommu_hash_common	2015-04-20 14:09:55 -04:00
iommu-helper.c
ioremap.c	x86, mm: support huge KVA mappings on x86	2015-04-14 16:49:04 -07:00
iov_iter.c	Merge branch 'iov_iter' into for-next	2015-04-11 22:26:51 -04:00
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c
Kconfig	This is the final removal (after several years!) of the obsolete cpus_*	2015-04-20 10:19:03 -07:00
Kconfig.debug	Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-05-06 10:26:37 -07:00
Kconfig.kasan	kasan: show gcc version requirements in Kconfig and Documentation	2015-05-05 17:10:10 -07:00
Kconfig.kgdb	kdb: Allow access to sensitive commands to be restricted by default	2014-11-11 09:31:52 -06:00
Kconfig.kmemcheck
kfifo.c	kfifo: use BUG_ON	2014-08-08 15:57:25 -07:00
klist.c	klist: use same naming scheme as hlist for klist_add_after()	2014-08-06 18:01:24 -07:00
kobject.c	kobject: WARN as tip when call kobject_get() to a kobject not initialized	2015-03-25 15:26:49 +01:00
kobject_uevent.c	lib/kobject_uevent.c: remove redundant include	2015-02-12 18:54:15 -08:00
kstrtox.c
kstrtox.h
lcm.c	block: fix blk_stack_limits() regression due to lcm() change	2015-03-31 09:45:50 -06:00
libcrc32c.c	crypto: LLVMLinux: Remove VLAIS usage from libcrc32c.c	2014-10-14 10:51:23 +02:00
list_debug.c
list_sort.c	lib/list_sort.c: rearrange includes	2015-02-12 18:54:15 -08:00
llist.c	lib/llist.c: remove redundant include	2015-02-12 18:54:15 -08:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c	locking/lockdep: Revert qrwlock recusive stuff	2014-10-03 06:09:30 +02:00
lockref.c	locking: Remove ACCESS_ONCE() usage	2015-02-24 08:44:16 +01:00
lru_cache.c	lru_cache: remove use of seq_printf return value	2015-04-15 16:35:25 -07:00
Makefile	Break up monolithic iommu table/lock into finer graularity pools and lock	2015-04-18 12:32:59 -07:00
md5.c	lib/md5.c: simplify include	2015-02-12 18:54:15 -08:00
memory-notifier-error-inject.c
memweight.c
net_utils.c	mac_pton: Use bool not int return	2014-06-25 17:45:43 -07:00
nlattr.c	netlink: pad nla_memcpy dest buffer with zeroes	2015-03-31 14:07:24 -04:00
notifier-error-inject.c
notifier-error-inject.h
of-reconfig-notifier-error-inject.c
oid_registry.c
parser.c
pci_iomap.c	pci: add pci_iomap_range	2015-01-21 16:28:49 +10:30
percpu-refcount.c	percpu_ref: make INIT_ATOMIC and switch_to_atomic() sticky	2014-09-24 13:31:50 -04:00
percpu_counter.c	percpu_counter: add @gfp to percpu_counter_init()	2014-09-08 09:51:29 +09:00
percpu_ida.c	lib/percpu_ida.c: remove redundant includes	2015-02-12 18:54:16 -08:00
percpu_test.c
plist.c	lib/plist.c: remove redundant include	2015-02-12 18:54:16 -08:00
pm-notifier-error-inject.c
proportions.c	proportions: add @gfp to init functions	2014-09-08 09:51:30 +09:00
radix-tree.c	lib/radix-tree.c: change to simpler include	2015-02-12 18:54:16 -08:00
random32.c	random32: improvements to prandom_bytes	2014-08-24 18:36:01 -07:00
ratelimit.c
rational.c
rbtree.c	lib/rbtree.c: fix typo in comment of __rb_insert()	2014-08-08 15:57:24 -07:00
rbtree_test.c
reciprocal_div.c
rhashtable.c	rhashtable: Add cap on number of elements in hash table	2015-05-16 18:08:26 -04:00
scatterlist.c	lib/scatterlist: fix memory leak with scsi-mq	2014-10-28 10:27:10 -06:00
seq_buf.c	seq_buf: Fix seq_buf_bprintf() truncation	2015-03-04 23:40:19 -05:00
sha1.c	lib: EXPORT_SYMBOL sha_init	2015-03-23 22:12:08 -04:00
show_mem.c	lib/show_mem.c: remove redundant include	2015-02-12 18:54:16 -08:00
smp_processor_id.c	percpu: add preemption checks to __this_cpu ops	2014-04-07 16:36:14 -07:00
sort.c	lib/sort.c: move include inside #if 0	2015-02-12 18:54:16 -08:00
stmp_device.c	lib/stmp_device.c: replace module.h include	2015-02-12 18:54:16 -08:00
string.c	lib: make memzero_explicit more robust against dead store elimination	2015-05-04 17:49:51 +08:00
string_helpers.c	SCSI misc on 20150416	2015-04-16 19:02:04 -04:00
strncpy_from_user.c	lib/strncpy_from_user.c: replace module.h include	2015-02-12 18:54:16 -08:00
strnlen_user.c
swiotlb.c	swiotlb: don't assume PA 0 is invalid	2014-06-20 16:04:32 -04:00
syscall.c
test-hexdump.c	hexdump: avoid warning in test function	2015-04-19 13:48:40 -07:00
test-kstrtox.c	lib/test-kstrtox.c: use ARRAY_SIZE instead of sizeof/sizeof[0]	2014-08-06 18:01:25 -07:00
test-string_helpers.c	lib/string_helpers.c: change semantics of string_escape_mem	2015-04-15 16:35:24 -07:00
test_bpf.c	test: bpf: expand DIV_KX to DIV_MOD_KX	2014-12-08 20:23:22 -05:00
test_firmware.c	test: add firmware_class loader test	2014-07-17 18:44:19 -07:00
test_kasan.c	lib: add kasan test module	2015-02-13 21:21:41 -08:00
test_module.c
test_rhashtable.c	test_rhashtable: Remove bogus max_size setting	2015-04-03 15:09:36 -04:00
test_user_copy.c
textsearch.c	lib/textsearch.c: remove textsearch_put reference from comments	2014-10-14 02:18:14 +02:00
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c	lib/vsprintf.c: improve put_dec_trunc8 slightly	2015-04-17 09:03:55 -04:00