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kern/44845: RUMP_MEMLIMIT crashes rump_ffs

>Number:         44845
>Category:       kern
>Synopsis:       RUMP_MEMLIMIT crashes rump_ffs
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 09 09:10:00 +0000 2011
>Originator:     Mihai Chelaru
>Release:        NetBSD 5.99.48
System: NetBSD 5.99.48 NetBSD 5.99.48 (Home) #62: Thu Apr 
7 17:26:06 EEST 2011
Architecture: x86_64
Machine: amd64
        setting RUMP_MEMLIMIT to a reasonable value (100M) causes rump_ffs to 
crash soon after starting a simple copy on target filesystem
        RUMP_MEMLIMIT=100000000 mount -o log,rump,rw /dev/rcgd0a /mnt/externc

        (start copy in a different terminal) and see it crash:

        pagedaemoness: failed to reclaim memory ... sleeping (deadlock?)
        panic: rumpuser fatal failure 11 (Resource deadlock avoided)



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