Re: [PATCH -v2] ext4: avoid unnecessary transaction stalls during writeback

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On Tue, May 02, 2017 at 02:10:44PM +0200, Jan Kara wrote:
> 
> Yeah, thanks for finding the problem and fixing it up! The updated patch
> looks good. It is actually relatively easy to fix the original approach so
> that we don't have to allocate ioend unnecessarily (we just fetch the inode
> pointer on error through bio_vec->bv_page->mapping->host) but I'll do that
> separately on top of this change.

We'll need to be a little bit careful to make sure this works for the
encryption case (where we use a temporary scratch/bounce buffer), but
it should be possible to make that work (we just have to look at the
right struct page).

					- Ted



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