Hi all,
I am facing a problem in 2.6.32-31 kernel, when I try to fetch
something from nfs server, and if there is no response server, for
example loss IP.
The user task will hang, and after scanning the RPC code, I think the
user task is actualy being slept by RPC, and will not wake up until it
get response from server.
The following is the log, it show the RPC retry, and finally
disconnect, However the use applcaiton is still hang/(sleep). I am
new to this, I don't know it is a design purpose for some condition or
it should be fixed in generel. But in my use case, I hope the user
application can know there is error from NFS/RPC, such that it can
dicide to do the fail response. But I don't read the RPC code in deep
yet,
would you please suggest me which part I should focus , thanks a lot.
[363855.998281] NFS: permission(0:18/1443226), mask=0x1, res=0
[363855.998286] NFS: dentry_delete(/out_A1.mp4, 88)
[363855.998303] NFS: permission(0:18/1443226), mask=0x1, res=0
[363855.998308] NFS: dentry_delete(/out_A3.mp4, 88)
[363855.998325] NFS: permission(0:18/1443226), mask=0x1, res=0
[363855.998329] NFS: dentry_delete(/zero, 88)
[363895.460527] RPC: 172 reserved req c344a000 xid 5f9ff6fe
[363895.460531] RPC: 172 xprt_prepare_transmit
[363895.460536] RPC: 172 xprt_transmit(96)
[363895.460556] RPC: 172 xmit complete
[363955.460015] RPC: 172 xprt_timer
[363955.460020] RPC: 172 xprt_prepare_transmit
[363955.460025] RPC: 172 xprt_transmit(96)
[363955.460037] RPC: 172 xmit complete
[364075.460015] RPC: 172 xprt_timer
[364075.460021] nfs: server 192.168.100.91 not responding, still trying
[364075.460025] RPC: 172 xprt_prepare_transmit
[364075.460030] RPC: 172 xprt_transmit(96)
[364075.460042] RPC: 172 xmit complete
[364135.460015] RPC: 172 xprt_timer
[364135.460020] RPC: 172 xprt_prepare_transmit
[364135.460026] RPC: 172 xprt_transmit(96)
[364135.460038] RPC: 172 xmit complete
[364255.460017] RPC: 172 xprt_timer
[364255.460022] RPC: 172 xprt_prepare_transmit
[364255.460027] RPC: 172 xprt_transmit(96)
[364255.460039] RPC: 172 xmit complete
[364315.460023] RPC: 172 xprt_timer
[364315.460028] RPC: 172 xprt_prepare_transmit
[364315.460033] RPC: 172 xprt_transmit(96)
[364315.460045] RPC: 172 xmit complete
[364435.460017] RPC: 172 xprt_timer
[364435.460023] RPC: 172 xprt_prepare_transmit
[364435.460028] RPC: 172 xprt_transmit(96)
[364435.460041] RPC: 172 xmit complete
[364495.460016] RPC: 172 xprt_timer
[364495.460021] RPC: 172 xprt_prepare_transmit
[364495.460026] RPC: 172 xprt_transmit(96)
[364495.460038] RPC: 172 xmit complete
[364615.460016] RPC: 172 xprt_timer
[364615.460022] RPC: 172 xprt_prepare_transmit
[364615.460027] RPC: 172 xprt_transmit(96)
[364615.460039] RPC: 172 xmit complete
[364675.460016] RPC: 172 xprt_timer
[364675.460021] RPC: 172 xprt_prepare_transmit
[364675.460026] RPC: 172 xprt_transmit(96)
[364675.460039] RPC: 172 xmit complete
[364795.460017] RPC: 172 xprt_timer
[364795.460022] RPC: 172 xprt_prepare_transmit
[364795.460027] RPC: 172 xprt_transmit(96)
[364795.460040] RPC: 172 xmit complete
[364855.460015] RPC: 172 xprt_timer
[364855.460020] RPC: 172 xprt_prepare_transmit
[364855.460025] RPC: 172 xprt_transmit(96)
[364855.460037] RPC: 172 xmit complete
[364944.152011] RPC: disconnected transport c3682000
[364944.152021] RPC: 172 xprt_prepare_transmit
[364944.152026] RPC: 172 xprt_transmit(96)
[364944.152031] RPC: disconnected transport c3682000
[364944.152037] RPC: 172 xprt_connect xprt c3682000 is not connected
[364944.152052] RPC: disconnected transport c3682000
[364944.152058] RPC: 172 xprt_connect_status: retrying
[364944.152061] RPC: 172 xprt_prepare_transmit
[364944.152064] RPC: 172 xprt_transmit(96)
[364944.152066] RPC: disconnected transport c3682000
[364944.152070] RPC: 172 xprt_connect xprt c3682000 is not connected
Regards,
Ivan
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