BUG: RAM won't overallocate, easily fixed, but considering options!

[sickcodes]

I'm trying to run but i got this error Unable to init server: Could not connect: Connection refused qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory QEMU 5.2.0 monitor - type 'help' for more information (qemu)
Can anyone help me?
I am trying the start OSX with this command
sudo docker run --device /dev/kvm --device /dev/snd -v /tmp/X11-unix:/tmp/X11-unix -e "DISPLAY=${DISPLAY:-:0.0}" sickcodes/docker-osx:latest

Originally posted by @C9-Dev in #131 (comment)

[sickcodes]

I'm trying to run but i got this error Unable to init server: Could not connect: Connection refused qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory QEMU 5.2.0 monitor - type 'help' for more information (qemu)
Can anyone help me?
I am trying the start OSX with this command
sudo docker run --device /dev/kvm --device /dev/snd -v /tmp/X11-unix:/tmp/X11-unix -e "DISPLAY=${DISPLAY:-:0.0}" sickcodes/docker-osx:latest

@C9-Dev I am also getting this Issue, it is because the default RAM is 8GB, and in this case, the server has BELOW that amount and kills.

I am updating the image now, perhaps 90% of MemTotal's 8152908 kB?

[arch@40a8c6c0937c OSX-KVM]$ cat /proc/meminfo
MemTotal:        8152908 kB
MemFree:         5208916 kB
MemAvailable:    7394820 kB
Buffers:           55608 kB
Cached:          2309448 kB
SwapCached:            0 kB
Active:          1202276 kB
Inactive:        1496992 kB
Active(anon):     337280 kB
Inactive(anon):      584 kB
Active(file):     864996 kB
Inactive(file):  1496408 kB
Unevictable:       18460 kB
Mlocked:           18460 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:              1160 kB
Writeback:             0 kB
AnonPages:        352432 kB
Mapped:           311224 kB
Shmem:              1572 kB
KReclaimable:      87824 kB
Slab:             175728 kB
SReclaimable:      87824 kB
SUnreclaim:        87904 kB
KernelStack:        6660 kB
PageTables:         8404 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     4076452 kB
Committed_AS:    3280588 kB
VmallocTotal:   34359738367 kB
VmallocUsed:       19568 kB
VmallocChunk:          0 kB
Percpu:             2944 kB
HardwareCorrupted:     0 kB
AnonHugePages:         0 kB
ShmemHugePages:        0 kB
ShmemPmdMapped:        0 kB
FileHugePages:         0 kB
FilePmdMapped:         0 kB
CmaTotal:              0 kB
CmaFree:               0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:               0 kB
DirectMap4k:      167916 kB
DirectMap2M:     2977792 kB
DirectMap1G:     5242880 kB
[arch@40a8c6c0937c OSX-KVM]$ 

[sickcodes]

user 100% of ram

echo $(("$(head -n1 /proc/meminfo | tr -dc '[:digit:]') / 900000"))

90% ram

echo $(("$(head -n1 /proc/meminfo | tr -dc '[:digit:]') / 900000"))

RAM=${RAM:-$(("$(head -n1 /proc/meminfo | tr -dc '[:digit:]') / 900000"))}000 \
exec qemu-system-x86_64 -m ${RAM} \

Or shall I set the default RAM to 2000 as that's the bare minimum anyway?

[yansigit]

Hi, I'm still getting same issue

user@pc:~$ docker run -it \
>     --device /dev/kvm \
>     -p 50922:10022 \
>     -v /tmp/.X11-unix:/tmp/.X11-unix \
>     -e "DISPLAY=${DISPLAY:-:0.0}" \
>     sickcodes/docker-osx:latest
touch: cannot touch '': No such file or directory
chown: cannot access '': No such file or directory
ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519 
nohup: appending output to 'nohup.out'
qemu-system-x86_64: warning: dbind: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-TT9MRS7Axy: Connection refused
QEMU 5.2.0 monitor - type 'help' for more information
(qemu) qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory

I've checked /dev/kvm permissions, xhost +, and if user in groups of libvirt, docker and kvm groups.
I'm not running in root account either.

I'm using these images

user@pc:~$ docker images
REPOSITORY             TAG       IMAGE ID       CREATED        SIZE
sickcodes/docker-osx   big-sur   24f7759e905b   21 hours ago   3.25GB
sickcodes/docker-osx   latest    45c4d709ad41   21 hours ago   3.08GB

[sickcodes]

How much RAM do you have

[yansigit]

@sickcodes i have 16GB size rams

[sickcodes]

Try now since I changed f6e0bfa

Default RAM is 3GB, you can change to something like 5 or 10 because it will use all of it

-e RAM=5 \

[sickcodes]

Another suitable candidate for increasing available RAM:

sync; echo 3 > /proc/sys/vm/drop_caches

Which clears your memory cache.

[sickcodes]

I removed RAM=max and changed the default to 3

export RAM="$(("$(head -n1 /proc/meminfo | tr -dc "[:digit:]") / 1000000"))"'

^This causes RAM creep. I left an idling machine on for 10 hours and I used about 16 of RAM by the end of it.

2GB is also slightly too small and causes mouse freezes (personally experienced, and seen in #207)

From the following reddit comment:
https://www.reddit.com/r/Proxmox/comments/8sy4sd/unable_to_start_vm/e13ghrz/?utm_source=reddit&utm_medium=web2x&context=3

[sickcodes]

sudo tee /proc/sys/vm/drop_caches <<< 3