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 On 2021/8/27 14:18, 徐力群 wrote:

 

 

*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/1f23816b8eb8fdc39990abe166c10a18c16... <https://github.com/torvalds/linux/commit/1f23816b8eb8fdc39990abe166c10a18c16f6b21>

https://github.com/torvalds/linux/commit/af822aa68fbdf0a480a17462ed702329981... <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 <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.