Date: Mon, 2 Mar 2015 18:47:07 -0700 From: Warner Losh <imp@bsdimp.com> To: George Rosamond <george@ceetonetechnology.com> Cc: freebsd-arm@freebsd.org Subject: Re: disabling journaling? Message-ID: <FDE574ED-732B-4E0A-991B-470EE53FFAC7@bsdimp.com> In-Reply-To: <54F5113E.9020405@ceetonetechnology.com> References: <54F5102A.10906@ceetonetechnology.com> <54F5113E.9020405@ceetonetechnology.com>
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[-- Attachment #1 --] > On Mar 2, 2015, at 6:41 PM, George Rosamond <george@ceetonetechnology.com> wrote: > > George Rosamond: >> Ian mentioned softupdates + journaling is a problem. >> >> https://marc.info/?l=freebsd-arm&m=142526289401012&w=2 >> >>> IMO, there's your problem right there. People have been reporting for >>> years that softupdates + journaling = corruption. The freebsd project's >>> collective response to all those reports has been a rather silent yawn. >>> The only sane response, IMO, is to not use journaling. >> >> Should crochet be adjusted for it in lib/disk.sh? >> >> # Turn on Softupdates >> tunefs -n enable ${NEW_UFS_DEVICE} >> # Turn on SUJ with a minimally-sized journal. >> # This makes reboots tolerable if you just pull power >> # Note: A slow SDHC reads about 1MB/s, so a 30MB >> # journal can delay boot by 30s. >> tunefs -j enable -S 4194304 ${NEW_UFS_DEVICE} >> # Turn on NFSv4 ACLs >> tunefs -N enable ${NEW_UFS_DEVICE} >> >> I assume journaling should go first. Besides in build scripts, don't >> know how this would be done a system for the root partition when you >> can't go into single-user mode. > > Let me qualify that. Should journaling be disabled by default on flash > media? This wouldn't necessarily apply to all Crochet builds. Media type shouldn’t matter. If there’s bugs, there’s bugs. Warner [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJU9RKcAAoJEGwc0Sh9sBEAcisP/0C/nrtkDdwy5j2Y7OASsXdr dhBHt3PnQvq6mt4y1bv3zPz0Wt9ZNueiaQepy5nF2/3J6OrlSkrfmKBhQB/3F1US Kcj9KcbDGvKBAZeq8QKeHMYbzrYAfGFrhQxOx1gVDCAbs1uSk5iAaBc2FfrAVS3s 3vDDd9GDBlYRv5EygT8JxfieMz9M3pYA/Bl8ltLhEZWyMIDa+v9yinjrsnZ72cFO gScREYFedqjTYdYwvtXmE4Y0UtVr/+Dwb3dJa6Va2qgSRBVy28k0lrSpJPsMqVwg 4Ick9KejAxIuLNjV0tPuaB2YxkX4AvLG4MAGE59PVQYXc4iYRUgJo4+P6rRnhGHQ JlvnIAeVEzi220vsJiwcABMOM2uZbLFvH8Mx55kng1DwY1TXwWVDr8a/esPaaAtz RWJRtqnd3qBvbra7x74FZT+e+UzpWoHzIgQnp2QfqbTQyLLI82EHFuwyhwcYPzPA MjNib+dogsfGPfcvw97xdkzg8ko7yP5qJUlqecdlaEInYfpHBmZ2FeT2Yicg39PV cgVBezvbLB/Jk+VikzZOkmTI5ojar3m+xH3c+AX1HkJOLa7vjb6rZoZtY/v8n1Mt 5s+B6qAzu5vvLA6emoJsOFy2ooW3E7FbjaU2HB6ZwpiUH1xyzAxACNXxqzf+H0CK 8FVk+Lk20tDHWPe4m/sb =ADAo -----END PGP SIGNATURE-----home | help
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