The following processes usually run on a reMarkable.
The application running the UI and everything that makes the reMarkable what it is, is called xochitl and runs as root (PID 182 in the listing below) which is a slight security risk:
remarkable: ~/ ps
PID USER VSZ STAT COMMAND
1 root 13136 S {systemd} /sbin/init
2 root 0 SW [kthreadd]
3 root 0 SW [ksoftirqd/0]
5 root 0 SW< [kworker/0:0H]
7 root 0 SW [watchdog/0]
8 root 0 SW< [khelper]
9 root 0 SW [kdevtmpfs]
10 root 0 SW< [perf]
11 root 0 SW [khungtaskd]
12 root 0 SW< [writeback]
13 root 0 SW< [crypto]
14 root 0 SW< [bioset]
15 root 0 SW< [kblockd]
16 root 0 SW< [devfreq_wq]
18 root 0 SW< [cfg80211]
20 root 0 SW [kswapd0]
21 root 0 SW [fsnotify_mark]
37 root 0 SW [pxp_dispatch]
38 root 0 SW< [ci_otg]
39 root 0 SW [irq/70-wacom_i2]
40 root 0 SW [irq/131-2-0024]
41 root 0 SW [kworker/0:2]
42 root 0 SW [cfinteractive]
43 root 0 SW [irq/210-mmc1]
44 root 0 SW [irq/211-mmc2]
45 root 0 SW< [ipv6_addrconf]
47 root 0 SW< [EPDC Submit]
48 root 0 SW< [EPDC Interrupt]
49 root 0 SW< [deferwq]
50 root 0 SW [kworker/u2:2]
51 root 0 SW [mmcqd/1]
52 root 0 SW [mmcqd/1boot0]
53 root 0 SW [mmcqd/1boot1]
54 root 0 SW [mmcqd/1rpmb]
55 root 0 SW< [kworker/0:1H]
56 root 0 SW [jbd2/mmcblk1p2-]
57 root 0 SW< [ext4-rsv-conver]
58 root 0 SW< [brcmf_wq/mmc2:0]
59 root 0 SW [brcmf_wdog/mmc2]
74 root 5944 S /lib/systemd/systemd-journald
94 root 10392 S /lib/systemd/systemd-udevd
118 systemd- 12688 S /lib/systemd/systemd-timesyncd
143 root 2780 S /sbin/syslogd -n -C
144 root 6940 S /usr/sbin/wpa_supplicant -C/var/run/wpa_supplicant -iwlan0
145 root 1952 S /sbin/agetty --noclear tty1 linux
146 root 2800 S /lib/systemd/systemd-logind
147 root 1952 S /sbin/agetty -8 -L ttymxc0 115200 xterm
148 messageb 4484 S /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation
155 systemd- 3120 S /lib/systemd/systemd-networkd
156 root 2716 S /sbin/klogd -n
159 root 3508 S /usr/sbin/dhcpcd -b --master wlan0
173 root 2716 S /usr/sbin/udhcpd -f /etc/udhcpd.usb0.conf
174 root 10784 S /usr/bin/qmdns-responder
178 root 0 SW [jbd2/mmcblk1p7-]
179 root 0 SW< [ext4-rsv-conver]
182 root 182m S /usr/bin/xochitl --system
183 root 31364 S /usr/bin/crashuploader --path /home/root/
191 root 0 SW< [kworker/u3:1]
194 root 0 SW< [kworker/u3:2]
263 root 0 SW [kworker/0:1]
270 root 2604 R /usr/sbin/dropbear -i -r /etc/dropbear/dropbear_rsa_host_key -B
271 root 3112 S -sh
305 root 0 SW [kworker/u2:1]
326 root 0 SW [kworker/u2:0]