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Message-ID: <20110424235928.71af51e0@neptune.home>
Date: Sun, 24 Apr 2011 23:59:28 +0200
From: Bruno Prémont <bonbons@...ux-vserver.org>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org, linux-fsdevel@...r.kernel.org
Subject: Re: 2.6.39-rc4+: Kernel leaking memory during FS scanning,
regression?
On Sun, 24 April 2011 Bruno Prémont <bonbons@...ux-vserver.org> wrote:
> On an older system I've been running Gentoo's revdep-rebuild to check
> for system linking/*.la consistency and after doing most of the work the
> system starved more or less, just complaining about stuck tasks now and
> then.
> Memory usage graph as seen from userspace showed sudden quick increase of
> memory usage though only a very few MB were swapped out (c.f. attached RRD
> graph).
Seems I've hit it once again (though detected before system was fully
stalled by trying to reclaim memory without success).
This time it was during simple compiling...
Gathered info below:
/proc/meminfo:
MemTotal: 480660 kB
MemFree: 64948 kB
Buffers: 10304 kB
Cached: 6924 kB
SwapCached: 4220 kB
Active: 11100 kB
Inactive: 15732 kB
Active(anon): 4732 kB
Inactive(anon): 4876 kB
Active(file): 6368 kB
Inactive(file): 10856 kB
Unevictable: 32 kB
Mlocked: 32 kB
SwapTotal: 524284 kB
SwapFree: 456432 kB
Dirty: 80 kB
Writeback: 0 kB
AnonPages: 6268 kB
Mapped: 2604 kB
Shmem: 4 kB
Slab: 250632 kB
SReclaimable: 51144 kB
SUnreclaim: 199488 kB <--- look big as well...
KernelStack: 131032 kB <--- what???
PageTables: 920 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 764612 kB
Committed_AS: 132632 kB
VmallocTotal: 548548 kB
VmallocUsed: 18500 kB
VmallocChunk: 525952 kB
AnonHugePages: 0 kB
DirectMap4k: 32704 kB
DirectMap4M: 458752 kB
sysrq+m:
[ 3908.107287] SysRq : Show Memory
[ 3908.109324] Mem-Info:
[ 3908.111266] DMA per-cpu:
[ 3908.113164] CPU 0: hi: 0, btch: 1 usd: 0
[ 3908.115061] Normal per-cpu:
[ 3908.116914] CPU 0: hi: 186, btch: 31 usd: 172
[ 3908.117253] active_anon:1989 inactive_anon:2057 isolated_anon:0
[ 3908.117253] active_file:1762 inactive_file:1841 isolated_file:0
[ 3908.117253] unevictable:8 dirty:0 writeback:0 unstable:0
[ 3908.117253] free:15704 slab_reclaimable:12672 slab_unreclaimable:49606
[ 3908.117253] mapped:518 shmem:0 pagetables:214 bounce:0
[ 3908.117253] DMA free:1936kB min:88kB low:108kB high:132kB active_anon:84kB inactive_anon:128kB active_file:4kB inactive_file:68kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15808kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:140kB slab_unreclaimable:4960kB kernel_stack:8592kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:467 all_unreclaimable? yes
[ 3908.117253] lowmem_reserve[]: 0 460 460
[ 3908.117253] Normal free:60880kB min:2696kB low:3368kB high:4044kB active_anon:7872kB inactive_anon:8100kB active_file:7044kB inactive_file:7296kB unevictable:32kB isolated(anon):0kB isolated(file):0kB present:471360kB mlocked:32kB dirty:0kB writeback:0kB mapped:2072kB shmem:0kB slab_reclaimable:50548kB slab_unreclaimable:193472kB kernel_stack:122384kB pagetables:856kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 3908.117253] lowmem_reserve[]: 0 0 0
[ 3908.117253] DMA: 52*4kB 216*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1936kB
[ 3908.117253] Normal: 14858*4kB 181*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 60880kB
[ 3908.117253] 5093 total pagecache pages
[ 3908.117253] 1490 pages in swap cache
[ 3908.117253] Swap cache stats: add 55685, delete 54195, find 25271/28670
[ 3908.117253] Free swap = 458944kB
[ 3908.117253] Total swap = 524284kB
[ 3908.117253] 122848 pages RAM
[ 3908.117253] 2699 pages reserved
[ 3908.117253] 4346 pages shared
[ 3908.117253] 84248 pages non-shared
ps auxf:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2 0.0 0.0 0 0 ? S 22:39 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S 22:39 0:00 \_ [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S 22:39 0:00 \_ [kworker/u:0]
root 6 0.0 0.0 0 0 ? R 22:39 0:01 \_ [rcu_kthread]
root 7 0.0 0.0 0 0 ? R 22:39 0:00 \_ [watchdog/0]
root 8 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [khelper]
root 138 0.0 0.0 0 0 ? S 22:39 0:00 \_ [sync_supers]
root 140 0.0 0.0 0 0 ? S 22:39 0:00 \_ [bdi-default]
root 142 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [kblockd]
root 230 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [ata_sff]
root 237 0.0 0.0 0 0 ? S 22:39 0:00 \_ [khubd]
root 365 0.0 0.0 0 0 ? S 22:39 0:01 \_ [kswapd0]
root 429 0.0 0.0 0 0 ? S 22:39 0:00 \_ [fsnotify_mark]
root 438 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [xfs_mru_cache]
root 439 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [xfslogd]
root 440 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [xfsdatad]
root 441 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [xfsconvertd]
root 497 0.0 0.0 0 0 ? S 22:39 0:00 \_ [scsi_eh_0]
root 500 0.0 0.0 0 0 ? S 22:39 0:00 \_ [scsi_eh_1]
root 514 0.0 0.0 0 0 ? S 22:39 0:00 \_ [scsi_eh_2]
root 517 0.0 0.0 0 0 ? S 22:39 0:00 \_ [scsi_eh_3]
root 521 0.0 0.0 0 0 ? S 22:39 0:00 \_ [kworker/u:5]
root 530 0.0 0.0 0 0 ? S 22:39 0:00 \_ [scsi_eh_4]
root 533 0.0 0.0 0 0 ? S 22:39 0:00 \_ [scsi_eh_5]
root 585 0.0 0.0 0 0 ? S< 22:39 0:00 \_ [kpsmoused]
root 659 0.0 0.0 0 0 ? S< 22:40 0:00 \_ [reiserfs]
root 1436 0.0 0.0 0 0 ? S 22:40 0:00 \_ [flush-8:0]
root 1642 0.0 0.0 0 0 ? S< 22:40 0:00 \_ [rpciod]
root 1643 0.0 0.0 0 0 ? S< 22:40 0:00 \_ [nfsiod]
root 1647 0.0 0.0 0 0 ? S 22:40 0:00 \_ [lockd]
root 21739 0.0 0.0 0 0 ? S< 23:05 0:00 \_ [ttm_swap]
root 1760 0.0 0.0 0 0 ? S 23:22 0:00 \_ [kworker/0:2]
root 13497 0.0 0.0 0 0 ? S 23:27 0:00 \_ [kworker/0:0]
root 14071 0.0 0.0 0 0 ? S 23:36 0:00 \_ [kworker/0:3]
root 15923 0.0 0.0 0 0 ? S 23:44 0:00 \_ [flush-0:18]
root 15924 0.0 0.0 0 0 ? S 23:44 0:00 \_ [flush-0:19]
root 15925 0.0 0.0 0 0 ? S 23:44 0:00 \_ [flush-0:20]
root 15926 0.0 0.0 0 0 ? S 23:44 0:00 \_ [flush-0:21]
root 1 0.0 0.0 1740 72 ? Ss 22:39 0:00 init [3]
root 759 0.0 0.0 2228 8 ? S<s 22:40 0:00 /sbin/udevd --daemon
root 1723 0.0 0.0 2224 8 ? S< 22:45 0:00 \_ /sbin/udevd --daemon
root 1327 0.0 0.0 4876 8 tty2 Ss+ 22:40 0:00 -bash
root 6122 0.4 0.0 34204 8 tty2 TN 23:24 0:07 \_ /usr/bin/python2.7 /usr/bin/emerge --oneshot media-gfx/gimp
portage 27988 0.0 0.0 5928 8 tty2 TN 23:28 0:00 \_ /bin/bash /usr/lib/portage/bin/ebuild.sh compile
portage 28231 0.0 0.0 6064 8 tty2 TN 23:28 0:00 \_ /bin/bash /usr/lib/portage/bin/ebuild.sh compile
portage 28245 0.0 0.0 4880 8 tty2 TN 23:28 0:00 \_ /bin/bash /usr/lib/portage/bin/ebuild-helpers/emake
portage 28250 0.0 0.0 3860 8 tty2 TN 23:28 0:00 \_ make -j2
portage 28251 0.0 0.0 3864 8 tty2 TN 23:28 0:00 \_ make all-recursive
portage 28252 0.0 0.0 4752 8 tty2 TN 23:28 0:00 \_ /bin/sh -c fail= failcom='exit 1'; \?for f in x $MAKEFLAGS; do \? case $f in \? *=* | --[!k]*);; \?
portage 12569 0.0 0.0 4752 8 tty2 TN 23:33 0:00 \_ /bin/sh -c fail= failcom='exit 1'; \?for f in x $MAKEFLAGS; do \? case $f in \? *=* | --[!k]*);; \
portage 12570 0.0 0.0 3864 8 tty2 TN 23:33 0:00 \_ make all
portage 12571 0.0 0.0 4752 8 tty2 TN 23:33 0:00 \_ /bin/sh -c fail= failcom='exit 1'; \?for f in x $MAKEFLAGS; do \? case $f in \? *=* | --[!
portage 15218 0.0 0.0 4752 8 tty2 TN 23:40 0:00 \_ /bin/sh -c fail= failcom='exit 1'; \?for f in x $MAKEFLAGS; do \? case $f in \? *=* |
portage 15219 0.0 0.0 3884 8 tty2 TN 23:40 0:00 \_ make all
portage 15912 0.0 0.0 1924 8 tty2 TN 23:42 0:00 \_ /usr/i686-pc-linux-gnu/gcc-bin/4.4.5/i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.
portage 15913 0.0 0.0 12724 8 tty2 TN 23:42 0:00 | \_ /usr/libexec/gcc/i686-pc-linux-gnu/4.4.5/cc1 -quiet -I. -I../.. -I../.. -I../.
portage 15914 0.0 0.0 5284 8 tty2 TN 23:42 0:00 | \_ /usr/lib/gcc/i686-pc-linux-gnu/4.4.5/../../../../i686-pc-linux-gnu/bin/as -Qy
portage 15916 0.0 0.0 1924 8 tty2 TN 23:43 0:00 \_ /usr/i686-pc-linux-gnu/gcc-bin/4.4.5/i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.
portage 15917 0.0 0.0 11540 8 tty2 TN 23:43 0:00 \_ /usr/libexec/gcc/i686-pc-linux-gnu/4.4.5/cc1 -quiet -I. -I../.. -I../.. -I../.
portage 15918 0.0 0.0 5284 8 tty2 TN 23:43 0:00 \_ /usr/lib/gcc/i686-pc-linux-gnu/4.4.5/../../../../i686-pc-linux-gnu/bin/as -Qy
root 1328 0.0 0.0 4876 8 tty3 Ss+ 22:40 0:00 -bash
root 13085 0.7 0.0 34128 92 tty3 TN 23:34 0:06 \_ /usr/bin/python2.7 /usr/bin/emerge --oneshot collectd
portage 13877 0.0 0.0 5924 8 tty3 TN 23:36 0:00 \_ /bin/bash /usr/lib/portage/bin/ebuild.sh prepare
portage 13899 0.0 0.0 5928 8 tty3 TN 23:36 0:00 \_ /bin/bash /usr/lib/portage/bin/ebuild.sh prepare
portage 15904 0.0 0.0 5928 8 tty3 TN 23:42 0:00 \_ /bin/bash /usr/lib/portage/bin/ebuild.sh prepare
portage 15911 0.0 0.0 4752 8 tty3 TN 23:42 0:00 \_ /bin/sh /usr/bin/autoconf --trace=AC_PROG_LIBTOOL
root 1329 0.0 0.0 1892 8 tty4 Ss+ 22:40 0:00 /sbin/agetty 38400 tty4 linux
root 1330 0.0 0.0 1892 8 tty5 Ss+ 22:40 0:00 /sbin/agetty 38400 tty5 linux
root 1331 0.0 0.0 1892 8 tty6 Ss+ 22:40 0:00 /sbin/agetty 38400 tty6 linux
root 1471 0.0 0.0 1928 8 ? Ss 22:40 0:00 dhcpcd -m 2 eth0
root 1512 0.0 0.0 5128 8 ? S 22:40 0:00 supervising syslog-ng
root 1513 0.0 0.0 5408 32 ? Ss 22:40 0:00 \_ /usr/sbin/syslog-ng
ntp 1537 0.0 0.0 4360 236 ? Ss 22:40 0:00 /usr/sbin/ntpd -p /var/run/ntpd.pid -u ntp:ntp
collectd 1555 0.1 0.2 45048 1032 ? SNLsl 22:40 0:05 /usr/sbin/collectd -P /var/run/collectd/collectd.pid -C /etc/collectd.conf
root 1613 0.0 0.0 2116 96 ? Ss 22:40 0:00 /sbin/rpcbind
root 1627 0.0 0.0 2188 8 ? Ss 22:40 0:00 /sbin/rpc.statd --no-notify
root 1687 0.0 0.0 4204 8 ? Ss 22:40 0:00 /usr/sbin/sshd
root 15929 0.1 0.0 7004 312 ? Ss 23:47 0:00 \_ sshd: root@.../2
root 15931 0.0 0.1 4876 808 pts/2 Ss 23:47 0:00 \_ -bash
root 15949 0.0 0.2 4124 972 pts/2 R+ 23:50 0:00 \_ ps auxf
root 1715 0.0 0.0 1892 8 tty1 Ss+ 22:40 0:00 /sbin/agetty 38400 tty1 linux
root 1716 0.0 0.0 1892 8 ttyS0 Ss+ 22:40 0:00 /sbin/agetty 115200 ttyS0 vt100
root 28160 0.0 0.0 1944 8 ? Ss 23:21 0:00 /usr/sbin/gpm -m /dev/input/mice -t ps2
/proc/slabinfo:
slabinfo - version: 2.1
# name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata <active_slabs> <num_slabs> <sharedavail>
squashfs_inode_cache 4240 4240 384 10 1 : tunables 0 0 0 : slabdata 424 424 0
nfs_direct_cache 0 0 72 56 1 : tunables 0 0 0 : slabdata 0 0 0
nfs_read_data 72 72 448 9 1 : tunables 0 0 0 : slabdata 8 8 0
nfs_inode_cache 252 252 568 14 2 : tunables 0 0 0 : slabdata 18 18 0
rpc_inode_cache 36 36 448 9 1 : tunables 0 0 0 : slabdata 4 4 0
RAWv6 12 12 672 12 2 : tunables 0 0 0 : slabdata 1 1 0
UDPLITEv6 0 0 672 12 2 : tunables 0 0 0 : slabdata 0 0 0
UDPv6 12 12 672 12 2 : tunables 0 0 0 : slabdata 1 1 0
tw_sock_TCPv6 25 25 160 25 1 : tunables 0 0 0 : slabdata 1 1 0
TCPv6 12 12 1312 12 4 : tunables 0 0 0 : slabdata 1 1 0
mqueue_inode_cache 8 8 480 8 1 : tunables 0 0 0 : slabdata 1 1 0
xfs_inode 0 0 608 13 2 : tunables 0 0 0 : slabdata 0 0 0
xfs_efd_item 0 0 288 14 1 : tunables 0 0 0 : slabdata 0 0 0
xfs_trans 0 0 224 18 1 : tunables 0 0 0 : slabdata 0 0 0
xfs_da_state 0 0 336 12 1 : tunables 0 0 0 : slabdata 0 0 0
xfs_log_ticket 0 0 176 23 1 : tunables 0 0 0 : slabdata 0 0 0
reiser_inode_cache 38160 38160 392 10 1 : tunables 0 0 0 : slabdata 3816 3816 0
configfs_dir_cache 73 73 56 73 1 : tunables 0 0 0 : slabdata 1 1 0
inotify_inode_mark 56 56 72 56 1 : tunables 0 0 0 : slabdata 1 1 0
posix_timers_cache 0 0 120 34 1 : tunables 0 0 0 : slabdata 0 0 0
UDP-Lite 0 0 512 8 1 : tunables 0 0 0 : slabdata 0 0 0
UDP 16 16 512 8 1 : tunables 0 0 0 : slabdata 2 2 0
tw_sock_TCP 32 32 128 32 1 : tunables 0 0 0 : slabdata 1 1 0
TCP 13 13 1184 13 4 : tunables 0 0 0 : slabdata 1 1 0
sgpool-128 12 12 2560 12 8 : tunables 0 0 0 : slabdata 1 1 0
sgpool-64 12 12 1280 12 4 : tunables 0 0 0 : slabdata 1 1 0
sgpool-32 12 12 640 12 2 : tunables 0 0 0 : slabdata 1 1 0
sgpool-16 12 12 320 12 1 : tunables 0 0 0 : slabdata 1 1 0
blkdev_queue 17 17 920 17 4 : tunables 0 0 0 : slabdata 1 1 0
blkdev_requests 27 38 208 19 1 : tunables 0 0 0 : slabdata 2 2 0
blkdev_ioc 102 102 40 102 1 : tunables 0 0 0 : slabdata 1 1 0
biovec-256 10 10 3072 10 8 : tunables 0 0 0 : slabdata 1 1 0
biovec-128 0 0 1536 10 4 : tunables 0 0 0 : slabdata 0 0 0
biovec-64 10 10 768 10 2 : tunables 0 0 0 : slabdata 1 1 0
sock_inode_cache 63 66 352 11 1 : tunables 0 0 0 : slabdata 6 6 0
skbuff_fclone_cache 11 11 352 11 1 : tunables 0 0 0 : slabdata 1 1 0
file_lock_cache 39 39 104 39 1 : tunables 0 0 0 : slabdata 1 1 0
shmem_inode_cache 920 920 400 10 1 : tunables 0 0 0 : slabdata 92 92 0
proc_inode_cache 33216 33216 336 12 1 : tunables 0 0 0 : slabdata 2768 2768 0
sigqueue 28 28 144 28 1 : tunables 0 0 0 : slabdata 1 1 0
bdev_cache 13 18 448 9 1 : tunables 0 0 0 : slabdata 2 2 0
sysfs_dir_cache 13260 13260 48 85 1 : tunables 0 0 0 : slabdata 156 156 0
mnt_cache 99 100 160 25 1 : tunables 0 0 0 : slabdata 4 4 0
inode_cache 3757 3757 312 13 1 : tunables 0 0 0 : slabdata 289 289 0
dentry 123232 123232 128 32 1 : tunables 0 0 0 : slabdata 3851 3851 0
buffer_head 2589 30003 56 73 1 : tunables 0 0 0 : slabdata 411 411 0
vm_area_struct 1792 1794 88 46 1 : tunables 0 0 0 : slabdata 39 39 0
mm_struct 68 76 416 19 2 : tunables 0 0 0 : slabdata 4 4 0
sighand_cache 85 96 1312 12 4 : tunables 0 0 0 : slabdata 8 8 0
task_struct 16410 16410 832 19 4 : tunables 0 0 0 : slabdata 885 885 0
anon_vma_chain 2352 2720 24 170 1 : tunables 0 0 0 : slabdata 16 16 0
anon_vma 1097 1190 24 170 1 : tunables 0 0 0 : slabdata 7 7 0
radix_tree_node 19019 19019 304 13 1 : tunables 0 0 0 : slabdata 1463 1463 0
idr_layer_cache 325 338 152 26 1 : tunables 0 0 0 : slabdata 13 13 0
dma-kmalloc-8192 0 0 8192 4 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-4096 0 0 4096 8 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-2048 0 0 2048 8 4 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-1024 0 0 1024 8 2 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-512 0 0 512 8 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-256 0 0 256 16 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-128 0 0 128 32 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-64 0 0 64 64 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-32 0 0 32 128 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-16 0 0 16 256 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-8 0 0 8 512 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-192 0 0 192 21 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-96 0 0 96 42 1 : tunables 0 0 0 : slabdata 0 0 0
kmalloc-8192 12 12 8192 4 8 : tunables 0 0 0 : slabdata 3 3 0
kmalloc-4096 293 296 4096 8 8 : tunables 0 0 0 : slabdata 37 37 0
kmalloc-2048 597 606 2048 8 4 : tunables 0 0 0 : slabdata 78 78 0
kmalloc-1024 6399 6400 1024 8 2 : tunables 0 0 0 : slabdata 800 800 0
kmalloc-512 18558 18560 512 8 1 : tunables 0 0 0 : slabdata 2320 2320 0
kmalloc-256 56 64 256 16 1 : tunables 0 0 0 : slabdata 4 4 0
kmalloc-128 1258587 1258592 128 32 1 : tunables 0 0 0 : slabdata 39331 39331 0
^^^^^^^^^^^^^^^
How may I find out who is using this many 128-byte
blocks?
kmalloc-64 25086 25088 64 64 1 : tunables 0 0 0 : slabdata 392 392 0
kmalloc-32 9720 9728 32 128 1 : tunables 0 0 0 : slabdata 76 76 0
kmalloc-16 2542 4864 16 256 1 : tunables 0 0 0 : slabdata 19 19 0
kmalloc-8 3580 3584 8 512 1 : tunables 0 0 0 : slabdata 7 7 0
kmalloc-192 10925 10941 192 21 1 : tunables 0 0 0 : slabdata 521 521 0
kmalloc-96 63462 63462 96 42 1 : tunables 0 0 0 : slabdata 1511 1511 0
kmem_cache 32 32 128 32 1 : tunables 0 0 0 : slabdata 1 1 0
kmem_cache_node 128 128 32 128 1 : tunables 0 0 0 : slabdata 1 1 0
Bruno
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