# Discard does not work on diskless node with latest 6.17.4-2-pve kernel **URL:** \ **Category:** DRBD\ **Tags:** drbd, linstor\ **Created:** [February 24, 2026, 11:49am UTC](https://forums.linbit.com/t/discard-does-not-work-on-diskless-node-with-latest-6-17-4-2-pve-kernel/1157 "2026-02-24T11:49:24Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![dori](https://avatars.discourse-cdn.com/v4/letter/d/439d5e/32.png) [@dori](https://forums.linbit.com/u/dori)\ **Post date:** [February 24, 2026, 11:49am UTC](https://forums.linbit.com/t/discard-does-not-work-on-diskless-node-with-latest-6-17-4-2-pve-kernel/1157/1 "2026-02-24T11:49:24Z")
Hi all! I encountered a strange problem after an upgrade to proxmox 9.1.5 using kernel 6.17.4-2-pve. When vm is live migrated to a diskless node discard doesn’t work anymore. `fstrim` command has no effect. Syslog shows the following error at the time of migration, which might be related to the problem: `Feb 24 11:52:42 tn3 kernel: drbd vm-3005-disk-1/0 drbd1009: setting new queue limits failed` If I live migrate the vm back to a diskfull node and do the `fstrim` then the space is properly reclaimed. I use LVMThin storage pool. Discard works properly on diskless nodes with an older kernel. The list of my tested combinations: `kernel drbd result ` ` ` `6.2.16-20-pve 9.2.14 works ` `6.2.16-20-pve 9.2.15 works ` `6.2.16-20-pve 9.2.16 works ` `6.2.16-20-pve 9.3.0 works ` `6.17.4-2-pve 9.2.16 doesn't work ` `6.17.4-2-pve 9.3.0 doesn't work` Am I missing something here? Thanks. ---
**Author:** ![dori](https://avatars.discourse-cdn.com/v4/letter/d/439d5e/32.png) [@dori](https://forums.linbit.com/u/dori)\ **Post date:** [March 3, 2026, 9:12pm UTC](https://forums.linbit.com/t/discard-does-not-work-on-diskless-node-with-latest-6-17-4-2-pve-kernel/1157/2 "2026-03-03T21:12:49Z")
Hi, with 9.3.1-rc.1 discard on diskless node works again. Tested with latest 6.17.13-1-pve kernel.