Messages in this thread | | | Date | Fri, 4 Sep 2020 12:21:29 -0400 (EDT) | From | Mikulas Patocka <> | Subject | make misbehavior on ext2 in dax mode (was: a crash when running strace from persistent memory) |
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On Thu, 3 Sep 2020, Mikulas Patocka wrote:
> Hi > > There's a bug when you run strace from dax-based filesystem.
Hmm, so I've found another bug in dax mode.
If you extract the Linux kernel tree on dax-based ext2 filesystem (use the real ext2 driver, not ext4), and then you run make twice, the second invocation will rebuild everything. It seems like a problem with timestamps.
mount -t ext2 -o dax /dev/pmem0 /mnt/ext2/ cd /mnt/ext2/usr/src/git/linux-2.6 make clean make -j12 make -j12 <--- this rebuilds the whole tree, althought it shouldn't
I wasn't able to bisect it because this bug seems to be present in every kernel I tried (back to 4.16.0). Ext4 doesn't seem to have this bug.
Mikulas
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