Your message dated Sun, 2 May 2021 13:46:24 +0200
with message-id
and subject line Re: Bug#931500: linux-image-4.19.0-5-amd64: kernel deadlock
with autofs
has caused the Debian Bug report #931500,
regarding linux-image-4.19.0-5-amd64: kernel deadlock with autofs
to be marked as done.
This means
Processing commands for cont...@bugs.debian.org:
> forwarded 931500
> https://lore.kernel.org/lkml/5022bdc4-9f3e-9756-cbca-ada37f88e...@cambridgegreys.com/
Bug #931500 [src:linux] linux-image-4.19.0-5-amd64: kernel deadlock with autofs
Set Bug forwarded-to-address to
'https://lore.kern
Same picture with different NFS minor versions - 4.0, 4.1
Same picture with and without hyperthreading
Same picture with and without different mitigations on/off via kernel
command line.
100% reproducible within 4-5 repeats of make -j `cat /proc/cpuinfo |
grep processor | wc -l` ; make
The most interesting part - it is always the same file.
ls -laF
/var/autofs/local/src/openwrt/build_dir/target-mips_24kc_musl/linux-ar71xx_tiny/linux-4.14.125/arch/mips/include/generated/uapi/asm/ipcbuf.h
It becomes invisible from the client, but exists in the server. Usually
takes ~4-5
There are clearly some issues with nfs across an autofs mount (maybe for
hard mounts as well), so this may warrant an upgrade.
Example test. Run make -j 12 ; make clean in a loop on an nfs mounted
openwrt tree until it fails (usually 2-3 iterations).
State on the client
ls -laF
On 08/07/2019 11:59, Anton Ivanov wrote:
There are clearly some issues with nfs across an autofs mount (maybe
for hard mounts as well), so this may warrant an upgrade.
Example test. Run make -j 12 ; make clean in a loop on an nfs mounted
openwrt tree until it fails (usually 2-3
Package: src:linux
Version: 4.19.37-5
Severity: normal
File: linux-image-4.19.0-5-amd64
Dear Maintainer,
An attempt to mount an nfs mount via autofs when it is being unmounted
sometimes results in a deadlock.
This is easier to reproduce with nfsv3. It is more difficult but still
possible
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