On Wed 30-03-16 16:01:29, Ross Zwisler wrote: > I've hit an issue in my testing which I believe to be related to the ext4 > block allocator when using the DAX mount option. I originally found this > issue with the generic/102 xfstest, but have reduced it to the minimal > reproducer at the bottom of this email. I've been able to reproduce this with > both BRD and with PMEM as the underlying block device. > > For this test we're running in a very small filesystem, only 512 MiB. We > fallocate() 400 MiB of that space, unlink the file, then try and rewrite that > 400 MiB file one chunk at a time. > > What actually happens is that during the rewrite we run out of memory and the > DAX call to get_block() in dax_io() fails with -ENOSPC. Yes, I have already sent a fix for this bug here: http://www.spinics.net/lists/linux-ext4/msg51649.html Ted, can you please pick it up? Thanks! Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
