Bug 9273

Summary: can't get a request slot
Product: [Retired] Red Hat Linux Reporter: kirk.erickson
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: high    
Version: 7.0CC: alan, magnus.moren
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2003-06-10 18:45:06 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Notes from my search for a fix none

Description kirk.erickson 2000-02-09 18:52:41 UTC 
I have my home directory on my home machine, and NFS mount it at work:
dsl-tor:/ on /hosts/dsl-tor type nfs (rw,addr=192.111.26.187)
When I attempt to copy a large file to work, or access a large file
(for example, rpm -q -l -p apache-1.3.9-4.src.rpm) a series of the
following messages appear in /var/log/messages at work:

Feb  9 09:24:48 gnu kernel: nfs: task 4235 can't get a request slot

I must reboot the work machine (client) to clear the failure.

Others have reported the failure, but I've searched for days now for
a fix and come up empty handed.  Trond wrote:

The messages themselves just mean that the RPC layer is congested, and
that a backlog of messages waiting to be sent is building up. Whenever
one of these messages times out, it issues the 'task xxx can't get a
request slot' error.

http://www.tux.org/hypermail/linux-kernel/1999week08/0198.html
--------------------------------------------------------------
Please try to update the 'mount' utility, and then use something like
'mount -onolock server:/directory /mountpoint' since the userland NFS
does not support locking. If you still see the 'task xxx can't get a
request slot' message, please contact me directly via email as I am
the one responsible for the NFS changes in ac5.

I've been unable to find a new 'mount' utililty.
I'd like to help isolate the failure, but I don't know how to proceed...
Comment 1 kirk.erickson 2000-02-09 19:08:59 UTC 
Created attachment 106 [details]
Notes from my search for a fix
Comment 2 kirk.erickson 2000-02-09 21:44:59 UTC 
Tried turning off autofs, and using amd instead.
Same failure.
Comment 3 kirk.erickson 2000-07-24 19:55:45 UTC 
Continued to see this problem under stcok 6.2,
and the latest kernel:  2.2-16-3.

Every Saturday morning, when I back up my home directory
(on my home machine) to my work machine this failure occurs.
The system locks up, and requires a <RESET> and manual
fsck to recover.
Comment 4 Cristian Gafton 2000-08-09 02:33:54 UTC 
assigned to johnsonm
Comment 5 Alan Cox 2003-06-10 18:45:06 UTC 
Closing old 2.2 related bug. All our errata are now 2.4 based so this bug
doesn't contain information we believe is worth keeping