linux-kernel - Re: [PATCH 03/13] scatterlist: Add sg_set

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Message-ID: <40a3ab47-da3e-0d08-b3fa-b4663f3e727d@linux.dev>
Date:   Sun, 30 Jul 2023 21:57:06 +0800
From:   Zhu Yanjun <yanjun.zhu@...ux.dev>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org, linux-afs@...ts.infradead.org,
        linux-nfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH 03/13] scatterlist: Add sg_set_folio()


在 2023/7/30 19:18, Matthew Wilcox 写道:
> On Sun, Jul 30, 2023 at 07:01:26PM +0800, Zhu Yanjun wrote:
>> Does the following function have folio version?
>>
>> "
>> int sg_alloc_append_table_from_pages(struct sg_append_table *sgt_append,
>> 		struct page **pages, unsigned int n_pages, unsigned int offset,
>> 		unsigned long size, unsigned int max_segment,
>> 		unsigned int left_pages, gfp_t gfp_mask)
>> "
> No -- I haven't needed to convert anything that uses
> sg_alloc_append_table_from_pages() yet.  It doesn't look like it should
> be _too_ hard to add a folio version.

In many places, this function is used. So this function needs the folio 
version.

Another problem, after folio is used, I want to know the performance 
after folio is implemented.

How to make tests to get the performance?

Thanks a lot.

Zhu Yanjun