Re: bcachefs bug during file creation and removal

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On Fri, Nov 11, 2016 at 04:52:42PM +0100, Karl-Philipp Richter wrote:
> Hi,
> During creation of an OpenAFS cache on a bcachefs mount (ca. 1 M files
> and directories) I probably got the error

The two errors are unrelated. The first warning is spurious - we fall back to
vmalloc() if kmalloc() fails, so I'll silence that.


>     [   97.560655] ------------[ cut here ]------------
>     [   97.560677] WARNING: CPU: 6 PID: 1802 at
> drivers/md/bcache/fs.c:78 __bch_write_inode+0x2d4/0x2e0 [bcache]

This one was a real bug - took awhile to track down, it was ultimately a bug in
the whiteouts compactaction code, it was using memcpy() when it was using
memmove() (and I couldn't reproduce it because the memcpy() I was getting did
the copy in the direction to make it work). It's fixed though - bcache-dev
should be working (I backed it out last week, after we figured out which commit
it was).

Thanks for the bug reports!
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