My old Acer Chromebook has got really, *really* slow. Like, every time I
change tab it re-loads the page. And If I am typing onto a page it lags
several seconds behind.
At first I thought it was a memory issue, and unloaded various extensions
from Chrome but the thing continues to be slow even with a stripped down
Chrome, and very few tabs poen.
chrome://system/ shows:
1. crashes in dmesg log e.g.
[ 8757.474061] Task chrome:10706 refused to die (killer main:6598:6598,
nvcsw=2928, nivcsw=11253) [ 8757.474084] chrome R running task 0 10706 5882
0x00100184 [ 8757.474102] ffff880002aaf7f8 0000000000000086
0000000000000000 ffff880014b2ee40 [ 8757.474119] ffff88001b61d2b0
ffff88001b61d2b0 0000000000013b40 ffff88001b61d2b0 [ 8757.474136]
ffffffffb636ff84 ffff880002aaffd8 ffff880029b50a50 0000000000000001 [
8757.474153] Call Trace: [ 8757.474169] [<ffffffffb636ff84>] ?
mmu_page_zap_pte+0xf/0x9f [ 8757.474184] [<ffffffffb69e6e89>]
preempt_schedule+0x36/0x51 [ 8757.474198] [<ffffffffb65d3c76>]
___preempt_schedule+0x35/0x67 [ 8757.474218] [<ffffffffb69eaadb>] ?
_raw_spin_unlock+0x1f/0x21 [ 8757.474230] [<ffffffffb637128a>]
mmu_shrink_scan+0xd6/0x189 [ 8757.474243] [<ffffffffb624638a>]
shrink_slab+0x1dd/0x4ab [ 8757.474257] [<ffffffffb649e7cc>]
try_to_free_pages+0x295/0x59b [ 8757.474272] [<ffffffffb623cb50>]
__alloc_pages_nodemask+0x218c/0x2be6 [ 8757.474286] [<ffffffffb6236544>] ?
pagecache_get_page+0x89/0x470 [ 8757.474300] [<ffffffffb625e029>]
read_swap_cache_async+0x91/0x1e0 [ 8757.474313] [<ffffffffb625e2dc>]
swapin_readahead+0x164/0x187 [ 8757.474326] [<ffffffffb6250915>]
handle_mm_fault+0xfe8/0x206f [ 8757.474340] [<ffffffffb6203481>]
__do_page_fault+0x2ff/0x45a [ 8757.474353] [<ffffffffb6200573>] ?
__switch_to+0x158/0x367 [ 8757.474365] [<ffffffffb6360e24>] ?
kvm_on_user_return+0x53/0x55 [ 8757.474378] [<ffffffffb62035e8>]
do_page_fault+0xc/0xe [ 8757.474389] [<ffffffffb69eceb2>]
page_fault+0x22/0x30
...
[ 8890.707420] ThreadPoolForeg: page allocation failure: order:0,
mode:0x200da [ 8890.707446] CPU: 0 PID: 21782 Comm: ThreadPoolForeg Not
tainted 3.18.0-19748-gc785fae00b84 #1 [ 8890.707459] Hardware name: GOOGLE
Cyan, BIOS Google_Cyan.7287.57.209 06/13/2019 [ 8890.707472]
0000000000000000 0000000062ad1553 ffff880028eff9c8 ffffffffb69e5f68 [
8890.707490] 0000000000000000 00000000000200da ffff880028effa58
ffffffffb649750d [ 8890.707507] 0000004000000000 0000000000000246
ffff880028effa58 ffffffffb64a3f01 [ 8890.707524] Call Trace: [ 8890.707541]
[<ffffffffb69e5f68>] dump_stack+0x4e/0x71 [ 8890.707555]
[<ffffffffb649750d>] warn_alloc_failed+0x114/0x13d [ 8890.707569]
[<ffffffffb64a3f01>] ? wait_iff_congested+0xfb/0x165 [ 8890.707583]
[<ffffffffb621eda1>] ? __wake_up_sync+0x12/0x12 [ 8890.707598]
[<ffffffffb623cc83>] __alloc_pages_nodemask+0x22bf/0x2be6 [ 8890.707613]
[<ffffffffb6263d5f>] ? zs_unmap_object+0x15c/0x17f [ 8890.707626]
[<ffffffffb6236544>] ? pagecache_get_page+0x89/0x470 [ 8890.707640]
[<ffffffffb625e029>] read_swap_cache_async+0x91/0x1e0 [ 8890.707653]
[<ffffffffb625e2dc>] swapin_readahead+0x164/0x187 [ 8890.707666]
[<ffffffffb69eaaca>] ? _raw_spin_unlock+0xe/0x21 [ 8890.707679]
[<ffffffffb6250915>] handle_mm_fault+0xfe8/0x206f [ 8890.707706]
[<ffffffffb6203481>] __do_page_fault+0x2ff/0x45a [ 8890.707719]
[<ffffffffb6200623>] ? __switch_to+0x208/0x367 [ 8890.707733]
[<ffffffffb6360e24>] ? kvm_on_user_return+0x53/0x55 [ 8890.707746]
[<ffffffffb62035e8>] do_page_fault+0xc/0xe [ 8890.707757]
[<ffffffffb69eceb2>] page_fault+0x22/0x30
...
etc etc
2. meminfo looks ok...
meminfo
Collapse…
MemTotal: 1992884 kB MemFree: 225724 kB MemAvailable: 464652 kB Buffers:
84064 kB Cached: 399772 kB SwapCached: 131508 kB Active: 787536 kB
Inactive: 358020 kB Active(anon): 537752 kB Inactive(anon): 179896 kB
Active(file): 249784 kB Inactive(file): 178124 kB Unevictable: 32436 kB
Mlocked: 34120 kB SwapTotal: 4095996 kB SwapFree: 3216904 kB Dirty: 100 kB
Writeback: 0 kB AnonPages: 682432 kB Mapped: 252072 kB Shmem: 55736 kB
Slab: 146864 kB SReclaimable: 72564 kB SUnreclaim: 74300 kB KernelStack:
21264 kB PageTables: 43176 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp:
0 kB CommitLimit: 5092436 kB Committed_AS: 30900496 kB VmallocTotal:
34359738367 kB VmallocUsed: 616564 kB VmallocChunk: 34359117316 kB
3. memusage not an issue:
mem_usage
Collapse…
Browser 229 MB, 493 FDs open of 8192 GPU [] 97 MB, 103 FDs open of 8192
Extension [Files] 76 MB, 42 FDs open of 2048 Extension [LastPass: Free
Password Manager] 72 MB, 41 FDs open of 2048 Tab [chromebook /dev/root full
- Google Search] 66 MB, 44 FDs open of 2048 Utility [Network Service] 60
MB, 52 FDs open of 8192 Extension [The Great Suspender] 53 MB, 45 FDs open
of 2048 Extension [Trello] 44 MB, 39 FDs open of 2048 Extension [Stylus] 44
MB, 37 FDs open of 2048 Extension [Office Editing for Docs, Sheets &
Slides] 39 MB, 30 FDs open of 2048 Extension [Text Mode] 37 MB, 36 FDs open
of 2048 Tab (Chrome) [About System] 35 MB, 43 FDs open of 2048 Extension
[WordWeb Dictionary Lookup] 35 MB, 30 FDs open of 2048 Utility [Assistant
Audio Decoder Service] 28 MB, 29 FDs open of 2048 Pepper Plugin Broker
[Shockwave Flash] 12 MB, 20 FDs open of 8192 Zygote 0 MB, 18 FDs open of
2048
4. But- aha! Disk is a problem -- but what is that file system?
disk_usage
Collapse…
Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 1834352
1813120 21232 99% / devtmpfs 995308 0 995308 0% /dev tmp 996440 168 996272
1% /tmp run 996440 748 995692 1% /run shmfs 996440 61652 934788 7% /dev/shm
/dev/mmcblk0p1 10801712 5520820 4712472 54% /mnt/stateful_partition
/dev/mmcblk0p8 11760 24 11412 1% /usr/share/oem
5. swapinfo seems ok...
swap_info
Collapse…
Filename Type Size Used Priority /dev/zram0 partition 4095996 879972 -1
low-memory margin (MiB): 101 778 min_filelist_kbytes (KiB): 400000
extra_free_kbytes (KiB): 0
edited highlights of system_files:
2.1G /home/
1.9G /mnt/stateful_partition/
top memory use: high load average but low CPU
top memory
Collapse…
top - 13:29:10 up 15:56, 0 users, load average: 2.20, 5.75, 6.30 Tasks: 273
total, 1 running, 272 sleeping, 0 stopped, 0 zombie %Cpu(s): 10.3 us, 12.8
sy, 0.0 ni, 76.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st MiB Mem : 1946.2 total,
425.0 free, 862.8 used, 658.4 buff/cache MiB Swap: 4000.0 total, 3308.7
free, 691.3 used. 765.3 avail Mem
Bringing up a 'crosh' terminal with Ctrl-Alt-T has limited usefulness.
It says similar story about memory:
crosh> free
total used free shared buff/cache
available
Mem: 1992884 1011540 275520 74764 705824
652340
Swap: 4095996 459816 3636180
crosh> meminfo
MemTotal: 1992884 kB
MemFree: 278860 kB
MemAvailable: 655724 kB
Buffers: 35624 kB
Cached: 609180 kB
SwapCached: 46336 kB
Active: 769940 kB
Inactive: 487288 kB
Active(anon): 483088 kB
Inactive(anon): 200948 kB
Active(file): 286852 kB
Inactive(file): 286340 kB
Unevictable: 32180 kB
Mlocked: 40664 kB
SwapTotal: 4095996 kB
SwapFree: 3636212 kB
But because it is not a 'deve;oper mode' install it does not give me
regular shell tools. So I can't look at that /dev/root file system.
crosh> ls /dev
ERROR: unknown command: ls
crosh> shell
ERROR: unknown command: shell
crosh> help
exit
Exit crosh.
help [command]
Display general help, or details for a specific command.
help_advanced
Display the help for more advanced commands, mainly used for debugging.
ping [-4] [-6] [-c count] [-i interval] [-n] [-s packetsize] [-W waittime]
<destination>
Send ICMP ECHO_REQUEST packets to a network host. If <destination> is
"gw"
then the next hop gateway for the default route is used.
Default is to use IPv4 [-4] rather than IPv6 [-6] addresses.
top
Run top.
crosh>
I am reluctant to install developer mode on the chromebook as that will
involve a powerwash factory reset and I have a few chrome extensions I
quite like, and stuff squirreled away in downloads that I don't want to
have to mess around with uploading to elsewhere.
ANyone else have any idea on what I can do to remedy this ? Just finding
out what's happening and why would be a start.
cheers
victor
--
Next meeting: BEC, Bournemouth, Tuesday, 2019-12-03 20:00
Check to whom you are replying
Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/
New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
