你好，

非常欢迎参与 openEuler kernel 开发。

首先在这里提交 issue，描述下要解决什么问题。

https://gitee.com/openeuler/kernel/issues

补丁的 Commit Message 中 附上对应的 issue 链接，

如在bugzila 行添加：
bugzilla: https://gitee.com/openeuler/kernel/issues/I3DJ83

然后将适配之后的补丁发往 kernel@openeuler.org,

有问题可以联系我或 Cheng Jian.

---

Xie XiuQi

 

 

发件人: 徐力群
发送时间: 2021年8月27日 14:18
收件人: kernel-owner@openeuler.org； <kernel-owner@openeuler.org;>; kernel@openeuler.org
主题: 请教一下，想提交一个内核的补丁，怎么操作，谢谢。（补丁内容见内）

 

该补丁打上之后，guest如果删除了磁盘的文件，那么从host上看磁盘文件会变小。

 

 

 

virtio_blk: add discard and write zeroes support

 

mainline inclusion

from mainline-5.14-rc7

commit 1f23816b8eb8fdc39990abe166c10a18c16f6b21、af822aa68fbdf0a480a17462ed70232998127453

category: bugfix

bugzilla: NA

CVE: NA

 

-------------------------------------------------

from：

https://github.com/torvalds/linux/commit/1f23816b8eb8fdc39990abe166c10a18c16f6b21

https://github.com/torvalds/linux/commit/af822aa68fbdf0a480a17462ed70232998127453

 

In commit 88c85538, "virtio-blk: add discard and write zeroes features

to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio

block specification has been extended to add VIRTIO_BLK_T_DISCARD and

VIRTIO_BLK_T_WRITE_ZEROES commands.  This patch enables support for

discard and write zeroes in the virtio-blk driver when the device

advertises the corresponding features, VIRTIO_BLK_F_DISCARD and

VIRTIO_BLK_F_WRITE_ZEROES.