On Sat, Jan 30, 2021 at 03:56:46AM +0000, Matthew Wilcox wrote:

On Tue, Jan 26, 2021 at 03:52:34PM +0100, Christoph Hellwig wrote:

quoted

bio_kmalloc shares almost no logic with the bio_set based fast path
in bio_alloc_bioset.  Split it into an entirely separate implementation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bio.c         | 167 ++++++++++++++++++++++----------------------
 include/linux/bio.h |   6 +-
 2 files changed, 86 insertions(+), 87 deletions(-)

This patch causes current linux-next to OOM for me when running xfstests
after about ten minutes.  Haven't looked into why yet, this is just the
results of a git bisect.

I've run tests on linux-next all weekend and could not reproduce
the issue.  Can you share your .config?