[Google Pixel XL Questions & Answers] RT Wolf:
Noticed something very odd about the partition table--there's no /cache! Gonna try to create it somehow.

/dev/block/platform/soc/624000.ufshc/by-name # [6nls -al
total 0
drwxr-xr-x 2 root root 1340 1970-01-01 02:09 .
drwxr-xr-x 4 root root 1440 1970-01-01 02:09 ..
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 aboot_a -> /dev/block/sda17
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 aboot_b -> /dev/block/sda18
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 apdp_a -> /dev/block/sda29
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 apdp_b -> /dev/block/sda30
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 board_info -> /dev/block/sdf1
lrwxrwxrwx 1 root root 36 1970-01-01 02:09 boot -> /dev/block/bootdevice/by-name/boot_b
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 boot_a -> /dev/block/sda19
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 boot_b -> /dev/block/sda20
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 bootlocker_a -> /dev/block/sda1
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 bootlocker_b -> /dev/block/sda2
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 cdt -> /dev/block/sdd12
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 cmnlib32_a -> /dev/block/sda13
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 cmnlib32_b -> /dev/block/sda14
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 cmnlib64_a -> /dev/block/sda15
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 cmnlib64_b -> /dev/block/sda16
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 ddr -> /dev/block/sdd11
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 devcfg_a -> /dev/block/sda23
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 devcfg_b -> /dev/block/sda24
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 devinfo -> /dev/block/sdf4
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 devinfobak -> /dev/block/sdd5
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 dip -> /dev/block/sdd7
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 dpo -> /dev/block/sdd6
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 frp -> /dev/block/sde1
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 fsc -> /dev/block/sdd8
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 fsg -> /dev/block/sdf3
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 hosd_a -> /dev/block/sda21
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 hosd_b -> /dev/block/sda22
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 hyp_a -> /dev/block/sda11
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 hyp_b -> /dev/block/sda12
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 keymaster_a -> /dev/block/sda3
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 keymaster_b -> /dev/block/sda4
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 metadata -> /dev/block/sde5
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 mfg -> /dev/block/sdf2
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 misc -> /dev/block/sdd1
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 modem_a -> /dev/block/sda25
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 modem_b -> /dev/block/sda26
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 modemst1 -> /dev/block/sdd9
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 modemst2 -> /dev/block/sdd10
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 msadp_a -> /dev/block/sda27
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 msadp_b -> /dev/block/sda28
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 persist -> /dev/block/sdd3
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 pg1fs -> /dev/block/sde3
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 pg2fs -> /dev/block/sde4
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 pmic_a -> /dev/block/sda9
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 pmic_b -> /dev/block/sda10
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 ramdump -> /dev/block/sde2
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 reserve0 -> /dev/block/sda36
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 reserve3 -> /dev/block/sdd13
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 reserve4 -> /dev/block/sde6
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 reserve5 -> /dev/block/sdf5
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 rpm_a -> /dev/block/sda7
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 rpm_b -> /dev/block/sda8
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 sec -> /dev/block/sdd4
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 ssd -> /dev/block/sdd2
lrwxrwxrwx 1 root root 38 1970-01-01 02:09 system -> /dev/block/bootdevice/by-name/system_b
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 system_a -> /dev/block/sda33
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 system_b -> /dev/block/sda34
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 tz_a -> /dev/block/sda5
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 tz_b -> /dev/block/sda6
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 userdata -> /dev/block/sda35
lrwxrwxrwx 1 root root 38 1970-01-01 02:09 vendor -> /dev/block/bootdevice/by-name/vendor_b
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 vendor_a -> /dev/block/sda31
lrwxrwxrwx 1 root root 16 1970-01-01 02:09 vendor_b -> /dev/block/sda32
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 xbl_a -> /dev/block/sdb1
lrwxrwxrwx 1 root root 15 1970-01-01 02:09 xbl_b -> /dev/block/sdc1

Edit: NVM. Looks like the /cache partition is gone for the Pixel XL.