From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: "linux-renesas-soc@vger.kernel.org" <linux-renesas-soc@vger.kernel.org>
Subject: About lazy_max_pages()
Date: Mon, 9 May 2016 11:39:36 +0000 [thread overview]
Message-ID: <SG2PR06MB091917A090460AEBEFF339E1D8700@SG2PR06MB0919.apcprd06.prod.outlook.com> (raw)
Hi,
I have a question about (1) in the following RFC:
http://www.spinics.net/lists/linux-rt-users/msg15082.html
Does Upstream accept such a patch?
< Overview >
My environment (v4.6-rc5 on arm64 / r8a7795) has similar situation
when dma_free_coherent() is called.
< For example (The buffer size is 1024 bytes.) >
- Sometimes the function spends about 8 msecs (worst-case).
- If I modified the value such the patch, sometimes the spend time is about 1 msecs (worst-case).
So, I would like to know that upstream accepts such a patch.
< Remarks >
I also tried both the (1) and (2) patches on my environment.
However, kernel stopped on the way.
Best regards,
Yoshihiro Shimoda
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reply other threads:[~2016-05-09 11:39 UTC|newest]
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