Re: [PATCH v3 4/5] zloop: set dma_alignment from the backing files for direct I/O
Hannes Reinecke <[email protected]>
| Newsgroups | dev.linux.lists.dm-devel,org.kernel.vger.linux-block,org.kernel.vger.linux-fsdevel |
|---|---|
| Message-ID | <[email protected]> |
On 6/24/26 7:09 PM, Keith Busch wrote: > From: Keith Busch <[email protected]> > > Direct I/O user pages are forwarded to the backing files unchanged, so > the backing's DMA alignment requirement applies to them. Track the > backing file's dio_mem_align and advertise it as the zloop device's > dma_alignment if it is larger than the default so we advertise proper > limits and misaligned I/O is rejected early instead of being dispatched > to the backend. > > Signed-off-by: Keith Busch <[email protected]> > --- > drivers/block/zloop.c | 35 +++++++++++++++++++++++++---------- > 1 file changed, 25 insertions(+), 10 deletions(-) > Reviewed-by: Hannes Reinecke <[email protected]> Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect [email protected] +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich