Re: [PATCH 20/23] rxrpc: use bvec_set_page to initialize a bvec
From: David Howells <dhowells@redhat.com>
Date: 2023-01-30 11:26:00
Also in:
ceph-devel, io-uring, kvm, linux-block, linux-cifs, linux-fsdevel, linux-mm, linux-nfs, linux-nvme, linux-scsi, target-devel, virtualization
Christoph Hellwig [off-list ref] wrote:
On Mon, Jan 30, 2023 at 10:31:23AM +0000, David Howells wrote:quoted
Christoph Hellwig [off-list ref] wrote:quoted
+ bvec_set_page(&bv, ZERO_PAGE(0), len, 0);Maybe bvec_set_zero_page()?Why?
Seems to be something people want to do quite a lot and don't know about. I've seen places where someone allocates a buffer and clears it just to use as a source of zeros. There's at least one place in cifs, for example. I know about it from wrangling arch code, but most people working on Linux haven't done that. David