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cc=ntf awl=host:13643 On 11/13/25 4:21 PM, Salvatore Bonaccorso wrote: > Hi Chuck, > > On Thu, Nov 13, 2025 at 12:47:23PM -0500, Chuck Lever wrote: >> On 11/13/25 12:16 PM, Tyler W. Ross wrote: >>> Thanks, Chunk. >>> >>> Suggested trace-cmd report from the client follows. Last 3 lines appear salient, but I've included the full report just in case. >>> >>> -0 [001] ..s2. 270.327040: xs_data_ready: peer=[10.108.2.102]:2049 >>> kworker/u16:0-12 [001] ...1. 270.327048: xprt_lookup_rqst: peer=[10.108.2.102]:2049 xid=0x7b569c7a status=0 >>> kworker/u16:0-12 [001] ...2. 270.327050: rpc_task_wakeup: task:00000008@00000005 flags=MOVEABLE|DYNAMIC|SENT|NORTO|CRED_NOREF runstate=0x6 status=0 timeout=15000 queue=xprt_pending >>> kworker/u16:0-12 [001] ..... 270.327054: xs_stream_read_request: peer=[10.108.2.102]:2049 xid=0x7b569c7a copied=988 reclen=988 offset=988 >>> kworker/u16:0-12 [001] ..... 270.327055: xs_stream_read_data: peer=[10.108.2.102]:2049 err=-11 total=992 >>> ls-969 [003] ..... 270.327062: rpc_task_sync_wake: task:00000008@00000005 flags=MOVEABLE|DYNAMIC|SENT|NORTO|CRED_NOREF runstate=RUNNING|0x4 status=0 action=call_status >>> ls-969 [003] ..... 270.327062: rpc_task_run_action: task:00000008@00000005 flags=MOVEABLE|DYNAMIC|SENT|NORTO|CRED_NOREF runstate=RUNNING|0x4 status=0 action=xprt_timer >>> ls-969 [003] ..... 270.327063: rpc_task_run_action: task:00000008@00000005 flags=MOVEABLE|DYNAMIC|SENT|NORTO|CRED_NOREF runstate=RUNNING|0x4 status=0 action=call_status >>> ls-969 [003] ..... 270.327063: rpc_task_run_action: task:00000008@00000005 flags=MOVEABLE|DYNAMIC|SENT|NORTO|CRED_NOREF runstate=RUNNING|0x4 status=0 action=call_decode >>> ls-969 [003] ..... 270.327063: rpc_xdr_recvfrom: task:00000008@00000005 head=[0xffff8895c29fef64,140] page=4008(88) tail=[0xffff8895c29feff0,36] len=988 >>> ls-969 [003] ..... 270.327067: rpc_xdr_overflow: task:00000008@00000005 nfsv4 READDIR requested=8 p=0xffff8895c29fefec end=0xffff8895c29feff0 xdr=[0xffff8895c29fef64,140]/4008/[0xffff8895c29feff0,36]/988 >> >> Here's the problem. This is a sign of an XDR decoding issue. If you >> capture the traffic with Wireshark, does Wireshark indicate where the >> XDR is malformed? >> >> If it doesn't, then there is some problem with the client code. Since >> Fedora 43 is working as expected, I would guess there's a misapplied >> patch on Debian 13's kernel...? > > if it is helpful: Debian follows the stable upstream releases (6.12.y > for trixie/Debian 13, right now 6.17.y for Debian unstable) and we try > to keep the patches limited which we apply on top. So far I see none > which touches net/sunrpc/. The patches applied: > https://salsa.debian.org/kernel-team/linux/-/tree/debian/6.17/forky/debian/patches?ref_type=heads > (in case this could help narrowing down more the issue). > > But we could try here additionally, if Tylor has the possibility to do > so, to try directly the 6.17.7 upstream version without Debian patches > applied. A bisect between broken v6.12.y and working v6.17.7 could identify what is possibly missing from v6.12.y. -- Chuck Lever