Re: [PATCH v2 00/10] Save memory for stripe_head buffer

On Thu, Aug 20, 2020 at 6:21 AM Yufen Yu [off-list ref] wrote:

[...]

 Patch 8 ~ 10 actually implement shared page between multiple devices of
 stripe_head. But they only make sense for PAGE_SIZE != 4096, likely, 64KB arm64
 system. It doesn't make any difference for PAGE_SIZE == 4096 system, likely x86.

 We have run tests of mdadm for raid456 and test raid6test module.
 Not found obvious errors.

Applied series to md-next.

I noticed there is another case where we allocate page for
sh->dev[i].orig_page in
handle_stripe_dirtying(). This only happens with journal devices.
Please run tests
with journal device.

Thanks,
Song