Hi! Debugging a long-standing NFS problem that kept causing application stalls and required frequent server reboots, we've identified symptoms very similar to what's described in the "false retries" patch in http://git.linux-nfs.org/?p=trondmy/linux-nfs.git;a=commit;h=3453d5708b33efe76f40eca1c0ed60923094b971. Unlike the original report (https://www.spinics.net/lists/linux-nfs/msg71508.html), we've seen this issue trigger with older kernels than 4.20, eg. with Ubuntu's standard and hwe kernels in its LTS releases. Testing now with a vanilla 5.1 kernel that got the patch merged, has been aggravated by an unrelated NFS regression (https://lkml.org/lkml/2019/5/29/772) and is therefore still ongoing, but looks promising so far. As far as I can tell, the patch has only been merged for 5.1 and up. Given that the bug seems to affect more systems than originally reported, would you deem it appropriate for inclusion into some of the older -stable trees? Kind regards, Daniel -- Daniel Kobras Principal Architect Puzzle ITC Deutschland +49 7071 14316 0 www.puzzle-itc.de -- Puzzle ITC Deutschland GmbH Sitz der Gesellschaft: Jurastr. 27/1, 72072 Tübingen Eingetragen am Amtsgericht Stuttgart HRB 765802 Geschäftsführer: Lukas Kallies, Daniel Kobras, Mark Pröhl
