On 16 Mar 2017, Jan Kara stated: > On Tue 28-02-17 22:22:25, Nix wrote: >> I first spotted this -- or it spotted me -- back in the v4.7.x days. It >> is still present in v4.10. >> >> Here's a replication recipe, given a reasonable rootfs with a compiler >> on it, and assuming a blank virtio disk on /dev/vdb: > > Yup, the problem is that we mmap file with inline data without unpacking > that and ext4_writepages() is unable to update inline data. Easy fix would > be to unpack inline data in ext4_page_mkwrite(), somewhat more complicated > fix would be to unpack inline data when extending file to too large size > via truncate and handle writing into inode in ext4_writepages(). I'll have > a look into fixing this. Thanks for report! You probably want to talk to Eric Biggers, who posted a partial fix a few days ago: <http://marc.info/?l=linux-ext4&m=148936608506059&w=2>
