Page allocation failures and lockups since Jessie on QNAP kirkwood NASes, even with 5gb swap-on-md-raid1 free
Hi. Since upgrading to Jessie, I've been experiencing frequent lockups on my
QNAP NASes (TS-419P+ and TS-219P) particularly under heavy I/O. Usually the
devices just drop dead (not even answering to ping), but today one crashing
machine logged some page allocation failures which were visible in the
journalctl log after a reboot.
In this case, the QNAP running Debian Jessie was serving as a NFS server to
another diskless amd64 machine which was running a large apt-get
dist-upgrade on unstable, in paricular dpkg unpacking operation. After
rebooting the QNAP Jessie NFS server, the amd64 machine's dist-upgrade
(which stayed stuck during the reboot) exited with stale file handle errors,
and, as verified with debsums and "dpkg --verify", several files belonging
to the last ~10 packages being unpacked were invalid (containing null
bytes).
The QNAP NAS has two ~2.7gb swap partitions on /dev/md31 and /dev/md32, both
of which are MD RAID1 devices, on (sdb9,sdc9) and (sda9,sdd9) respectively.
It's now running an automatically triggered RAID rebuild on most of its MD
devices (and it also logged around 50x "clearing orphaned inode" in
systemd-fsck on reboot)
The last loglines on the QNAP NAS before reboot is attached below.
I also had similar hangs when moving ~20gb worth of files with "mv" from
one ext4 partition to another on one of the NASes.
Has anyone seen anything similar? It absolutely appears to be related to
heavy IO activity.
This never happened during wheezy, so I'm wondering if there is something
with the new 3.16.x kernels in jessie that wasn't a problem on the old 3.2.x
kernels in wheezy for this platform?
Current uname -a:
Linux eternity 3.16.0-4-kirkwood #1 Debian 3.16.7-ckt11-1+deb8u2 (2015-07-17) armv5tel GNU/Linux
Logged page allocation failured:
Jul 27 13:12:42 hostname kernel: nfsd: page allocation failure: order:0, mode:0x20
Jul 27 13:12:47 hostname kernel: CPU: 0 PID: 1099 Comm: nfsd Not tainted 3.16.0-4-kirkwood #1 Debian 3.16.7-ckt11-1+deb8u2
Jul 27 13:12:47 hostname kernel: [<c00100c4>] (unwind_backtrace) from [<c000c45c>] (show_stack+0x18/0x1c)
Jul 27 13:12:47 hostname kernel: [<c000c45c>] (show_stack) from [<c00b6e68>] (warn_alloc_failed+0xdc/0x10c)
Jul 27 13:12:48 hostname kernel: [<c00b6e68>] (warn_alloc_failed) from [<c00b9894>] (__alloc_pages_nodemask+0x838/0x944)
Jul 27 13:12:48 hostname kernel: [<c00b9894>] (__alloc_pages_nodemask) from [<c03014b0>] (__netdev_alloc_frag+0x58/0x120)
Jul 27 13:12:48 hostname kernel: [<c03014b0>] (__netdev_alloc_frag) from [<c0306604>] (__netdev_alloc_skb+0x3c/0xdc)
Jul 27 13:12:48 hostname kernel: [<c0306604>] (__netdev_alloc_skb) from [<bf32c7fc>] (rxq_refill+0x50/0x158 [mv643xx_eth])
Jul 27 13:12:48 hostname kernel: [<bf32c7fc>] (rxq_refill [mv643xx_eth]) from [<bf32ce9c>] (mv643xx_eth_poll+0x510/0x580 [mv643xx_eth])
Jul 27 13:12:48 hostname kernel: [<bf32ce9c>] (mv643xx_eth_poll [mv643xx_eth]) from [<c030f918>] (net_rx_action+0xe8/0x228)
Jul 27 13:12:48 hostname kernel: [<c030f918>] (net_rx_action) from [<c001def8>] (__do_softirq+0x10c/0x288)
Jul 27 13:12:48 hostname kernel: [<c001def8>] (__do_softirq) from [<c001e120>] (do_softirq+0x4c/0x5c)
Jul 27 13:12:48 hostname kernel: [<c001e120>] (do_softirq) from [<c001e1c0>] (__local_bh_enable_ip+0x90/0xb4)
Jul 27 13:12:48 hostname kernel: [<c001e1c0>] (__local_bh_enable_ip) from [<bf41aa50>] (svc_recv+0x464/0x904 [sunrpc])
Jul 27 13:12:48 hostname kernel: [<bf41aa50>] (svc_recv [sunrpc]) from [<bf4e7760>] (nfsd+0xb0/0x12c [nfsd])
Jul 27 13:12:48 hostname kernel: [<bf4e7760>] (nfsd [nfsd]) from [<c0034dc8>] (kthread+0xc0/0xd4)
Jul 27 13:12:48 hostname kernel: [<c0034dc8>] (kthread) from [<c0009490>] (ret_from_fork+0x14/0x20)
Jul 27 13:12:48 hostname kernel: Mem-info:
Jul 27 13:12:48 hostname kernel: DMA per-cpu:
Jul 27 13:12:48 hostname kernel: CPU 0: hi: 186, btch: 31 usd: 58
Jul 27 13:12:48 hostname kernel: active_anon:7414 inactive_anon:7819 isolated_anon:0
active_file:45448 inactive_file:45618 isolated_file:0
unevictable:0 dirty:2832 writeback:90 unstable:0
free:240 slab_reclaimable:10738 slab_unreclaimable:3703
mapped:10466 shmem:1514 pagetables:533 bounce:0
free_cma:0
Jul 27 13:12:48 hostname kernel: DMA free:960kB min:2864kB low:3580kB high:4296kB active_anon:29656kB inactive_anon:31276kB active_file:181792kB inactive_file:182472kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:524288kB managed:513716kB mlocked:0kB dirty:11328kB writeback:360kB mapped:41864kB shmem:6056kB slab_reclaimable:42952kB slab_unreclaimable:14812kB kernel_stack:1176kB pagetables:2132kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jul 27 13:12:48 hostname kernel: lowmem_reserve[]: 0 0 0 0
Jul 27 13:12:48 hostname kernel: DMA: 28*4kB (MR) 2*8kB (R) 0*16kB 0*32kB 1*64kB (R) 2*128kB (R) 0*256kB 1*512kB (R) 0*1024kB 0*2048kB 0*4096kB = 960kB
Jul 27 13:12:48 hostname kernel: 92580 total pagecache pages
Jul 27 13:12:48 hostname kernel: 0 pages in swap cache
Jul 27 13:12:48 hostname kernel: Swap cache stats: add 38, delete 38, find 0/0
Jul 27 13:12:48 hostname kernel: Free swap = 5582840kB
Jul 27 13:12:48 hostname kernel: Total swap = 5582992kB
Jul 27 13:12:48 hostname kernel: 131072 pages of RAM
Jul 27 13:12:48 hostname kernel: 625 free pages
Jul 27 13:12:48 hostname kernel: 2643 reserved pages
Jul 27 13:12:48 hostname kernel: 14132 slab pages
Jul 27 13:12:48 hostname kernel: 156218 pages shared
Jul 27 13:12:48 hostname kernel: 0 pages swap cached
Jul 27 13:12:48 hostname kernel: ksoftirqd/0: page allocation failure: order:0, mode:0x20
Jul 27 13:12:48 hostname kernel: CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 3.16.0-4-kirkwood #1 Debian 3.16.7-ckt11-1+deb8u2
Jul 27 13:12:48 hostname kernel: [<c00100c4>] (unwind_backtrace) from [<c000c45c>] (show_stack+0x18/0x1c)
Jul 27 13:12:48 hostname kernel: [<c000c45c>] (show_stack) from [<c00b6e68>] (warn_alloc_failed+0xdc/0x10c)
Jul 27 13:12:48 hostname kernel: [<c00b6e68>] (warn_alloc_failed) from [<c00b9894>] (__alloc_pages_nodemask+0x838/0x944)
Jul 27 13:12:48 hostname kernel: [<c00b9894>] (__alloc_pages_nodemask) from [<c03014b0>] (__netdev_alloc_frag+0x58/0x120)
Jul 27 13:12:48 hostname kernel: [<c03014b0>] (__netdev_alloc_frag) from [<c0306604>] (__netdev_alloc_skb+0x3c/0xdc)
Jul 27 13:12:48 hostname kernel: [<c0306604>] (__netdev_alloc_skb) from [<bf32c7fc>] (rxq_refill+0x50/0x158 [mv643xx_eth])
Jul 27 13:12:48 hostname kernel: [<bf32c7fc>] (rxq_refill [mv643xx_eth]) from [<bf32ce9c>] (mv643xx_eth_poll+0x510/0x580 [mv643xx_eth])
Jul 27 13:12:48 hostname kernel: [<bf32ce9c>] (mv643xx_eth_poll [mv643xx_eth]) from [<c030f918>] (net_rx_action+0xe8/0x228)
Jul 27 13:12:48 hostname kernel: [<c030f918>] (net_rx_action) from [<c001def8>] (__do_softirq+0x10c/0x288)
Jul 27 13:12:48 hostname kernel: [<c001def8>] (__do_softirq) from [<c001e0a4>] (run_ksoftirqd+0x30/0x60)
Jul 27 13:12:48 hostname kernel: [<c001e0a4>] (run_ksoftirqd) from [<c003afe0>] (smpboot_thread_fn+0x138/0x14c)
Jul 27 13:12:48 hostname kernel: [<c003afe0>] (smpboot_thread_fn) from [<c0034dc8>] (kthread+0xc0/0xd4)
Jul 27 13:12:48 hostname kernel: [<c0034dc8>] (kthread) from [<c0009490>] (ret_from_fork+0x14/0x20)
Jul 27 13:12:48 hostname kernel: Mem-info:
Jul 27 13:12:48 hostname kernel: DMA per-cpu:
Jul 27 13:12:48 hostname kernel: CPU 0: hi: 186, btch: 31 usd: 58
Jul 27 13:12:48 hostname kernel: active_anon:7414 inactive_anon:7819 isolated_anon:0
active_file:45448 inactive_file:45618 isolated_file:0
unevictable:0 dirty:2832 writeback:90 unstable:0
free:240 slab_reclaimable:10738 slab_unreclaimable:3703
mapped:10466 shmem:1514 pagetables:533 bounce:0
free_cma:0
Jul 27 13:12:48 hostname kernel: DMA free:960kB min:2864kB low:3580kB high:4296kB active_anon:29656kB inactive_anon:31276kB active_file:181792kB inactive_file:182472kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:524288kB managed:513716kB mlocked:0kB dirty:11328kB writeback:360kB mapped:41864kB shmem:6056kB slab_reclaimable:42952kB slab_unreclaimable:14812kB kernel_stack:1176kB pagetables:2132kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jul 27 13:12:48 hostname kernel: lowmem_reserve[]: 0 0 0 0
Jul 27 13:12:48 hostname kernel: DMA: 28*4kB (MR) 2*8kB (R) 0*16kB 0*32kB 1*64kB (R) 2*128kB (R) 0*256kB 1*512kB (R) 0*1024kB 0*2048kB 0*4096kB = 960kB
Jul 27 13:12:48 hostname kernel: 92580 total pagecache pages
Jul 27 13:12:48 hostname kernel: 0 pages in swap cache
Jul 27 13:12:48 hostname kernel: Swap cache stats: add 38, delete 38, find 0/0
Jul 27 13:12:48 hostname kernel: Free swap = 5582840kB
Jul 27 13:12:48 hostname kernel: Total swap = 5582992kB
Jul 27 13:12:48 hostname kernel: 131072 pages of RAM
Jul 27 13:12:48 hostname kernel: 625 free pages
Jul 27 13:12:48 hostname kernel: 2643 reserved pages
Jul 27 13:12:48 hostname kernel: 14132 slab pages
Jul 27 13:12:48 hostname kernel: 156218 pages shared
Jul 27 13:12:48 hostname kernel: 0 pages swap cached
Jul 27 13:13:33 hostname kernel: nfsd: page allocation failure: order:0, mode:0x20
Jul 27 13:13:33 hostname kernel: CPU: 0 PID: 1099 Comm: nfsd Not tainted 3.16.0-4-kirkwood #1 Debian 3.16.7-ckt11-1+deb8u2
Jul 27 13:13:33 hostname kernel: [<c00100c4>] (unwind_backtrace) from [<c000c45c>] (show_stack+0x18/0x1c)
Jul 27 13:13:33 hostname kernel: [<c000c45c>] (show_stack) from [<c00b6e68>] (warn_alloc_failed+0xdc/0x10c)
Jul 27 13:13:33 hostname kernel: [<c00b6e68>] (warn_alloc_failed) from [<c00b9894>] (__alloc_pages_nodemask+0x838/0x944)
Jul 27 13:13:33 hostname kernel: [<c00b9894>] (__alloc_pages_nodemask) from [<c03014b0>] (__netdev_alloc_frag+0x58/0x120)
Jul 27 13:13:33 hostname kernel: [<c03014b0>] (__netdev_alloc_frag) from [<c0306604>] (__netdev_alloc_skb+0x3c/0xdc)
Jul 27 13:13:33 hostname kernel: [<c0306604>] (__netdev_alloc_skb) from [<bf32c7fc>] (rxq_refill+0x50/0x158 [mv643xx_eth])
Jul 27 13:13:33 hostname kernel: [<bf32c7fc>] (rxq_refill [mv643xx_eth]) from [<bf32ce9c>] (mv643xx_eth_poll+0x510/0x580 [mv643xx_eth])
Jul 27 13:13:33 hostname kernel: [<bf32ce9c>] (mv643xx_eth_poll [mv643xx_eth]) from [<c030f918>] (net_rx_action+0xe8/0x228)
Jul 27 13:13:33 hostname kernel: [<c030f918>] (net_rx_action) from [<c001def8>] (__do_softirq+0x10c/0x288)
Jul 27 13:13:33 hostname kernel: [<c001def8>] (__do_softirq) from [<c001e2d4>] (irq_exit+0x88/0xe8)
Jul 27 13:13:33 hostname kernel: [<c001e2d4>] (irq_exit) from [<c0009d28>] (handle_IRQ+0x6c/0x88)
Jul 27 13:13:33 hostname kernel: [<c0009d28>] (handle_IRQ) from [<c000cf60>] (__irq_svc+0x40/0x4c)
Jul 27 13:13:33 hostname kernel: [<c000cf60>] (__irq_svc) from [<c00d29dc>] (page_address+0x3c/0xc8)
Jul 27 13:13:33 hostname kernel: [<c00d29dc>] (page_address) from [<bf4f5550>] (nfs3svc_decode_writeargs+0x140/0x160 [nfsd])
Jul 27 13:13:33 hostname kernel: [<bf4f5550>] (nfs3svc_decode_writeargs [nfsd]) from [<bf4e7ccc>] (nfsd_dispatch+0x5c/0x1cc [nfsd])
Jul 27 13:13:33 hostname kernel: [<bf4e7ccc>] (nfsd_dispatch [nfsd]) from [<bf40bf5c>] (svc_process_common+0x3a0/0x690 [sunrpc])
Jul 27 13:13:33 hostname kernel: [<bf40bf5c>] (svc_process_common [sunrpc]) from [<bf40c318>] (svc_process+0xcc/0xf0 [sunrpc])
Jul 27 13:13:33 hostname kernel: [<bf40c318>] (svc_process [sunrpc]) from [<bf4e7778>] (nfsd+0xc8/0x12c [nfsd])
Jul 27 13:13:33 hostname kernel: [<bf4e7778>] (nfsd [nfsd]) from [<c0034dc8>] (kthread+0xc0/0xd4)
Jul 27 13:13:33 hostname kernel: [<c0034dc8>] (kthread) from [<c0009490>] (ret_from_fork+0x14/0x20)
Jul 27 13:13:33 hostname kernel: Mem-info:
Jul 27 13:13:33 hostname kernel: DMA per-cpu:
Jul 27 13:13:33 hostname kernel: CPU 0: hi: 186, btch: 31 usd: 140
Jul 27 13:13:33 hostname kernel: active_anon:7417 inactive_anon:7819 isolated_anon:0
active_file:45218 inactive_file:45613 isolated_file:0
unevictable:0 dirty:876 writeback:0 unstable:0
free:258 slab_reclaimable:10650 slab_unreclaimable:3733
mapped:10787 shmem:1514 pagetables:533 bounce:0
free_cma:0
Jul 27 13:13:33 hostname kernel: DMA free:1032kB min:2864kB low:3580kB high:4296kB active_anon:29668kB inactive_anon:31276kB active_file:180872kB inactive_file:182452kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:524288kB managed:513716kB mlocked:0kB dirty:3504kB writeback:0kB mapped:43148kB shmem:6056kB slab_reclaimable:42600kB slab_unreclaimable:14932kB kernel_stack:1176kB pagetables:2132kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jul 27 13:13:33 hostname kernel: lowmem_reserve[]: 0 0 0 0
Jul 27 13:13:33 hostname kernel: DMA: 108*4kB (EMR) 31*8kB (MR) 4*16kB (R) 3*32kB (R) 1*64kB (R) 1*128kB (R) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1032kB
Jul 27 13:13:33 hostname kernel: 92346 total pagecache pages
Jul 27 13:13:33 hostname kernel: 0 pages in swap cache
Jul 27 13:13:33 hostname kernel: Swap cache stats: add 38, delete 38, find 0/0
Jul 27 13:13:33 hostname kernel: Free swap = 5582840kB
Jul 27 13:13:33 hostname kernel: Total swap = 5582992kB
Jul 27 13:13:33 hostname kernel: 131072 pages of RAM
Jul 27 13:13:33 hostname kernel: 725 free pages
Jul 27 13:13:33 hostname kernel: 2643 reserved pages
Jul 27 13:13:33 hostname kernel: 14068 slab pages
Jul 27 13:13:33 hostname kernel: 163381 pages shared
Jul 27 13:13:33 hostname kernel: 0 pages swap cached
Jul 27 13:13:33 hostname kernel: systemd-journal: page allocation failure: order:0, mode:0x20
Jul 27 13:13:33 hostname kernel: CPU: 0 PID: 271 Comm: systemd-journal Not tainted 3.16.0-4-kirkwood #1 Debian 3.16.7-ckt11-1+deb8u2
Jul 27 13:13:33 hostname kernel: [<c00100c4>] (unwind_backtrace) from [<c000c45c>] (show_stack+0x18/0x1c)
Jul 27 13:13:33 hostname kernel: [<c000c45c>] (show_stack) from [<c00b6e68>] (warn_alloc_failed+0xdc/0x10c)
Jul 27 13:13:33 hostname kernel: [<c00b6e68>] (warn_alloc_failed) from [<c00b9894>] (__alloc_pages_nodemask+0x838/0x944)
Jul 27 13:13:33 hostname kernel: [<c00b9894>] (__alloc_pages_nodemask) from [<c03014b0>] (__netdev_alloc_frag+0x58/0x120)
Jul 27 13:13:33 hostname kernel: [<c03014b0>] (__netdev_alloc_frag) from [<c0306604>] (__netdev_alloc_skb+0x3c/0xdc)
Jul 27 13:13:33 hostname kernel: [<c0306604>] (__netdev_alloc_skb) from [<bf32c7fc>] (rxq_refill+0x50/0x158 [mv643xx_eth])
Jul 27 13:13:33 hostname kernel: [<bf32c7fc>] (rxq_refill [mv643xx_eth]) from [<bf32ce9c>] (mv643xx_eth_poll+0x510/0x580 [mv643xx_eth])
Jul 27 13:13:33 hostname kernel: [<bf32ce9c>] (mv643xx_eth_poll [mv643xx_eth]) from [<c030f918>] (net_rx_action+0xe8/0x228)
Jul 27 13:13:33 hostname kernel: [<c030f918>] (net_rx_action) from [<c001def8>] (__do_softirq+0x10c/0x288)
Jul 27 13:13:33 hostname kernel: [<c001def8>] (__do_softirq) from [<c001e120>] (do_softirq+0x4c/0x5c)
Jul 27 13:13:33 hostname kernel: [<c001e120>] (do_softirq) from [<c001e1c0>] (__local_bh_enable_ip+0x90/0xb4)
Jul 27 13:13:33 hostname kernel: [<c001e1c0>] (__local_bh_enable_ip) from [<c0109f60>] (update_time+0x90/0x98)
Jul 27 13:13:33 hostname kernel: [<c0109f60>] (update_time) from [<c010a194>] (file_update_time+0xbc/0xe0)
Jul 27 13:13:33 hostname kernel: [<c010a194>] (file_update_time) from [<bf190968>] (ext4_page_mkwrite+0x48/0x448 [ext4])
Jul 27 13:13:33 hostname kernel: [<bf190968>] (ext4_page_mkwrite [ext4]) from [<c00d3924>] (do_page_mkwrite+0x44/0xb4)
Jul 27 13:13:33 hostname kernel: [<c00d3924>] (do_page_mkwrite) from [<c00d50c0>] (do_wp_page.isra.87+0x1d0/0x6e8)
Jul 27 13:13:33 hostname kernel: [<c00d50c0>] (do_wp_page.isra.87) from [<c00d6e60>] (handle_mm_fault+0x7fc/0x914)
Jul 27 13:13:33 hostname kernel: [<c00d6e60>] (handle_mm_fault) from [<c0012a20>] (do_page_fault+0x124/0x360)
Jul 27 13:13:33 hostname kernel: [<c0012a20>] (do_page_fault) from [<c00083a0>] (do_DataAbort+0x3c/0xa0)
Jul 27 13:13:33 hostname kernel: [<c00083a0>] (do_DataAbort) from [<c000d09c>] (__dabt_usr+0x3c/0x40)
Jul 27 13:13:33 hostname kernel: Exception stack(0xddb6ffb0 to 0xddb6fff8)
Jul 27 13:13:33 hostname kernel: ffa0: b512cdd0 00000000 00000008 b512cdd0
Jul 27 13:13:33 hostname kernel: ffc0: b85e9830 00000001 b512cdd0 00000000 00000066 00000000 02d64dd0 00000000
Jul 27 13:13:33 hostname kernel: ffe0: 00000000 bec53a10 b6f47b60 b6e20730 20000010 ffffffff
Jul 27 13:13:33 hostname kernel: Mem-info:
Jul 27 13:13:33 hostname kernel: DMA per-cpu:
Jul 27 13:13:33 hostname kernel: CPU 0: hi: 186, btch: 31 usd: 140
Jul 27 13:13:33 hostname kernel: active_anon:7417 inactive_anon:7819 isolated_anon:0
active_file:45218 inactive_file:45613 isolated_file:0
unevictable:0 dirty:876 writeback:0 unstable:0
free:258 slab_reclaimable:10650 slab_unreclaimable:3733
mapped:10787 shmem:1514 pagetables:533 bounce:0
free_cma:0
Jul 27 13:13:33 hostname kernel: DMA free:1032kB min:2864kB low:3580kB high:4296kB active_anon:29668kB inactive_anon:31276kB active_file:180872kB inactive_file:182452kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:524288kB managed:513716kB mlocked:0kB dirty:3504kB writeback:0kB mapped:43148kB shmem:6056kB slab_reclaimable:42600kB slab_unreclaimable:14932kB kernel_stack:1176kB pagetables:2132kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jul 27 13:13:33 hostname kernel: lowmem_reserve[]: 0 0 0 0
Jul 27 13:13:33 hostname kernel: DMA: 108*4kB (EMR) 31*8kB (MR) 4*16kB (R) 3*32kB (R) 1*64kB (R) 1*128kB (R) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1032kB
Jul 27 13:13:33 hostname kernel: 92346 total pagecache pages
Jul 27 13:13:33 hostname kernel: 0 pages in swap cache
Jul 27 13:13:33 hostname kernel: Swap cache stats: add 38, delete 38, find 0/0
Jul 27 13:13:33 hostname kernel: Free swap = 5582840kB
Jul 27 13:13:33 hostname kernel: Total swap = 5582992kB
Jul 27 13:13:33 hostname kernel: 131072 pages of RAM
Jul 27 13:13:33 hostname kernel: 725 free pages
Jul 27 13:13:33 hostname kernel: 2643 reserved pages
Jul 27 13:13:33 hostname kernel: 14068 slab pages
Jul 27 13:13:33 hostname kernel: 163382 pages shared
Jul 27 13:13:33 hostname kernel: 0 pages swap cached
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