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Date:      Tue, 02 Apr 2019 12:59:58 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 236961] [VFS] vfs_bio_getpages: infinite loop
Message-ID:  <bug-236961-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236961

            Bug ID: 236961
           Summary: [VFS] vfs_bio_getpages: infinite loop
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: alexandre.martins@stormshield.eu

Hi,

I currently have some trouble with a amd64 HEAD build machine.

This machine cross compile for an ARMv6 host.

During the compilation, objcopy enter in an infinite loop. The process is s=
tuck
(unkillable) in "RUN" state:

@@
  PID   %CPU %MEM     VSZ    RSS TT  STAT STARTED       TIME COMMAND
93219   99.5  0.1   12844   3580  -  R    11:46    184:34.58 objcopy -j .peh
...
@@

The only thing a can get for now is the kernel backtrace via "procstat -kk
93219", that I run in loop

There are some of the data:
@@
__lockmgr_args+0x62a getblkx+0x154 breadn_flags+0x3d vfs_bio_getpages+0x323
ffs_getpages+0x78 VOP_GETPAGES_APV+0x56 ...
        gbincore+0x38 getblkx+0xab breadn_flags+0x3d vfs_bio_getpages+0x323
ffs_getpages+0x78 VOP_GETPAGES_APV+0x56 ...
                                  breadn_flags+0x1e9 vfs_bio_getpages+0x323
ffs_getpages+0x78 VOP_GETPAGES_APV+0x56 ...
                  __lockmgr_args+0x672 binsfree+0x51 vfs_bio_getpages+0x386
ffs_getpages+0x78 VOP_GETPAGES_APV+0x56 ...
                                   vm_page_grab+0x6b vfs_bio_getpages+0x4ac
ffs_getpages+0x78 VOP_GETPAGES_APV+0x56 ...
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
ffs_getpages+0x78 VOP_GETPAGES_APV+0x56 ...
@@

The "common" part is the vfs_bio_getpages that seems to endless loop.

What I can do to bring more info for that issue ?

Best regards

Alexandre

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