On Saturday, August 13, 2016 at 6:14:44 AM UTC-4, Marek Marczykowski-Górecki wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > On Sat, Aug 13, 2016 at 03:11:57AM -0700, Andrew David Wong wrote: > > On 2016-08-12 20:57, zackp...@gmail.com wrote: > > > Hi all, I'm a new qubes user and have been following the guides to get > > > trim enabled for the dom0. Everything seems to have gone smoothly until > > > the > > > grub steps. I can't find a grub.cfg file anywhere. The only abnormality to > > > my installation is that it's UEFI. So the closest thing I did find to this > > > was /boot/efi/EFI/qubes/xen.cfg which had the kernel line referenced in > > > the > > > trim guide. However, when I attempt to run grub2-mkconfig -o > > > /boot/efi/EFI/qubes/xen.cfg I get "grub2-mkconfig: command not found" All > > > that is present in the /boot/grub2 folder is a themes folder. I am using > > > the main dom0 terminal for all of this. > > > > > > Considering that everything boots fine, I'm hesitant to reinstall grub2 > > > (I > > > assume it would need to be grub2-efi in this case). Any clue as to what's > > > going on? Thanks > > > > > > > I think grub2-mkconfig is not found because you're using UEFI rather than > > legacy boot. Are you getting your instructions from here? > > > > https://www.qubes-os.org/doc/disk-trim/ > > > > I think these instructions were written with legacy boot in mind. I'm not > > sure > > how to enable TRIM on UEFI (CCing Marek). > > Yes, on UEFI install /boot/efi/EFI/qubes/xen.cfg is the right file - you > need to edit it directly. > > - -- > Best Regards, > Marek Marczykowski-Górecki > Invisible Things Lab > A: Because it messes up the order in which people normally read text. > Q: Why is top-posting such a bad thing? > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2 > > iQEcBAEBCAAGBQJXrvMNAAoJENuP0xzK19csfqQH/0/P4FV8W2/pZhWaCeXfseqj > fw79GDTa5/ExjxSg4eehHDhHHVgG3kaeb0HafPvVnHS/DJuHzCG1Xrs1vyZJlPID > oCrH4FaaYQ2Che4L4D/Koh5lNEdEakKOrF7ILbTRN5u8Q4xvdM9KQ/paacCYkCDJ > YlYKELzyOZ1wkUvwttPynTANdrMlY797BHkHYHv2TbaMBTjw4EYmIs+VM9MRIWIv > Lis1hZn97y1z3ZIQglrQRCDLAmoNJPBsXRdMHjNyA5EeKQPX+fNxsE3/HIoqrIi3 > 3DHYzKIS/UBDFHOJXj7I3pK311fS1IcUlrbRCXJYCM0gF5A5EkWKxIj0ghV0YTI= > =uhvX > -----END PGP SIGNATURE-----
So I'm editing the right file, that's all and good. Here's what I've done so far: #Find UUID of ssd ls /dev/mapper/luks-* #Set trim in crypttab sudo nano /etc/crypttab #Add "allow-discards" at end of entry for ssd with matching UUID #Set trim in fstab sudo nano /etc/fstab #Add "discard" after other flags (like "default") for everything but swap sudo nano /etc/lvm/lvm.conf #Change "issue_discards" from "0" to "1" #Add discard to grub sudo nano /boot/efi/EFI/qubes/xen.cfg #At the end of the kernel line, add "rd.luks.allow-discards=1" #Rebuild initramfs sudo dracut -H -f ##Check if discard (trim) is enabled: lsblk -D #OR sudo dmsetup table Everything above works except that lsblk still shows no trim support so I guess that the rebuilding of grub is an important step in this. How do I rebuild it with UEFI? I tried: grub2-mkconfig -o /boot/efi/EFI/qubes/xen.cfg but I just get the grub2-mkconfig not found error -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/80d636f9-a331-449b-9b46-2ad1b7301523%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
