Hi Chuck, On Sat, Dec 28, 2024 at 12:13:56PM -0500, Chuck Lever wrote: > On 12/28/24 1:09 AM, Salvatore Bonaccorso wrote: > > Hi, > > > > On Fri, Dec 27, 2024 at 04:31:44PM -0500, Chuck Lever wrote: > > > On 12/27/24 1:36 AM, Salvatore Bonaccorso wrote: > > > > Hi, > > > > > > > > On Thu, Dec 26, 2024 at 08:17:45PM +0100, Salvatore Bonaccorso wrote: > > > > > Hi Chuck, hi all, > > > > > > > > > > On Thu, Dec 26, 2024 at 11:33:01AM -0500, Chuck Lever wrote: > > > > > > On 12/26/24 11:24 AM, Salvatore Bonaccorso wrote: > > > > > > > Hi Jur, > > > > > > > > > > > > > > On Mon, Dec 09, 2024 at 04:50:05PM +0000, Jur van der Burg via Bugspray Bot wrote: > > > > > > > > Jur van der Burg writes via Kernel.org Bugzilla: > > > > > > > > > > > > > > > > I tried kernel 6.10.1 and that one is ok. In the mean time I > > > > > > > > upgraded nfs-utils from 2.5.1 to 2.8.1 which seems to fix the issue. > > > > > > > > Sorry for the noise, case closed. > > > > > > > > > > > > > > > > View: https://bugzilla.kernel.org/show_bug.cgi?id=219580#c2 > > > > > > > > You can reply to this message to join the discussion. > > > > > > > > > > > > > > Are you sure this is solved? I got hit by this today after trying to > > > > > > > check the report from another Debian user: > > > > > > > > > > > > > > https://bugs.debian.org/1091439 > > > > > > > the earlier report was > > > > > > > https://bugs.debian.org/1087900 > > > > > > > > > > > > > > Surprisingly I managed to hit this, after: > > > > > > > > > > > > > > Doing a fresh Debian installation with Debian unstable, rebooting > > > > > > > after installation. The running kernel is 6.12.6-1 (but now believe it > > > > > > > might be hit in any sufficient earlier version): > > > > > > > > > > > > > > Notably, in kernel-log I see as well > > > > > > > > > > > > > > [ 50.295209] RPC: Registered tcp NFSv4.1 backchannel transport module. > > > > > > > [ 52.158301] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory > > > > > > > [ 52.158333] NFSD: Using legacy client tracking operations. > > > > > > > > > > > > Hi Salvatore, > > > > > > > > > > > > If you no longer provision nfsdcltrack in user space, then you want to > > > > > > set CONFIG_NFSD_LEGACY_CLIENT_TRACKING to 'N' in your kernel config. > > > > > > > > > > Right, while this might not be possible right now in the distribution, > > > > > to confirm, setting CONFIG_NFSD_LEGACY_CLIENT_TRACKING would resolve > > > > > the problem. In the distribution I think we would not yet be able to > > > > > do a hard cut for planned next stable release. > > > > > > > > > > Remember, that in Debian we only with the current stable release got > > > > > again somehow on "track" with nfs-utils code. > > > > > > > > > > > Otherwise, Scott Mayhew is the area expert (cc'd). > > > > > > > > > > Thanks! > > > > > > > > > > I will try to get more narrow down to the versions to see where the > > > > > problem might be introduced, but if you already have a clue, and know > > > > > what we might try (e.g. commit revert on top, or patch) I'm happy to > > > > > test this as well (since now reliably able to trigger it). > > > > > > > > Okay so this was maybe obvious for you already but bisecting leads to > > > > the first bad commit beeing: > > > > > > > > 74fd48739d04 ("nfsd: new Kconfig option for legacy client tracking") > > > > > > > > The Problem is not present in v6.7 and it is triggerable with > > > > 74fd48739d04 ("nfsd: new Kconfig option for legacy client tracking") > > > > > > > > Most importantly as the switch to defaulting to y was only in later > > > > versions, explicitly setting CONFIG_NFSD_LEGACY_CLIENT_TRACKING=y. > > > > > > Hi Salvatore - > > > > > > I see that Scott recently sent a fix for a similar crash to linux-nfs@ : > > > > > > https://lore.kernel.org/linux-nfs/032ff3ad487ce63656f95c6cdf3db8543fb0d061.camel@xxxxxxxxxx/T/#t > > > > Oh right, this described escactly the problem. > > > > Do you think that can be made reaching 6.13 as well (and then > > cherry-picked to the affected stable series 6.12.y) or do we have to > > wait for landing in 6.14 first? > > In nfsd-next, this fix is tagged: > > Fixes: 74fd48739d04 ("nfsd: new Kconfig option for legacy client tracking") > > So it will be backported to all appropriate earlier kernels as soon as > it goes into Linus's master via the v6.14 merge window (in a couple of > weeks). Yes right, I was more wondering if it is eliglible for already land in v6.13 as it is a bufix. But the issue has been open for long already, so I guess waiting until it lands in v6.14 and then only get applied way down as needed has to be sufficient. Thanks all for your work, Regards, Salvatore
