From: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
To: Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>,
Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Bart Van Assche
<bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>,
Yishai Hadas
<yishaih-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
Yishai Hadas <yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Joonsoo Kim <iamjoonsoo.kim-Hm3cg6mZ9cc@public.gmane.org>,
Haggai Eran <haggaie-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Majd Dibbiny <majd-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: RDMA Read: Local protection error
Date: Sun, 29 May 2016 10:02:53 +0300 [thread overview]
Message-ID: <574A941D.9050404@grimberg.me> (raw)
In-Reply-To: <alpine.DEB.2.20.1605261511230.8857-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
>> Sagi,
>> I'm wondering if allocation from ZONE_DMA is the right way to
>> replace ZONE_NORMAL allocations.
>>
>> I don't remember if memory compaction works on ZONE_DMA and it makes
>> me nervous to think about long and multiple alloc/dealloc MR scenario.
>
> ZONE_DMA is a 16M memory segment used for legacy devices of the PC/AT era
> (such as floppy drivers). Please do not use it.
Really? It's used all over the stack...
So the suggestion is to restrict the allocation does not
cross the page boundary (which can easily be done with making
MLX4_MR_PAGES_ALIGN be PAGE_SIZE or larger than PAGE_SIZE/2)?
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next prev parent reply other threads:[~2016-05-29 7:02 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-29 16:24 RDMA Read: Local protection error Chuck Lever
[not found] ` <1A4F4C32-CE5A-44D9-9BFE-0E1F8D5DF44D-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-04-29 16:44 ` Santosh Shilimkar
[not found] ` <3fb4e75f-ff14-34e2-b6d3-6b6046812845-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-04-29 16:58 ` Chuck Lever
[not found] ` <72E8335B-282B-4DCC-AE4F-FE7E50ED5A08-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-04-29 19:07 ` Santosh Shilimkar
2016-04-29 16:45 ` Bart Van Assche
[not found] ` <57238F8C.70505-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-04-29 17:02 ` Chuck Lever
2016-04-29 17:34 ` Laurence Oberman
2016-05-02 15:10 ` Chuck Lever
[not found] ` <B72A389F-FFF1-498C-A946-8AA72B7769F8-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-05-02 16:08 ` Bart Van Assche
[not found] ` <57277B63.8030506-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-05-03 14:57 ` Chuck Lever
[not found] ` <6BBFD126-877C-4638-BB91-ABF715E29326-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-05-04 1:07 ` Joonsoo Kim
2016-05-04 19:59 ` Chuck Lever
[not found] ` <F6C79393-6174-49B3-ADBB-E40627DEE85D-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-05-09 1:03 ` Joonsoo Kim
[not found] ` <CAAmzW4NbY3Og0BgQyeA4LLXTnMuPTjxVUdFbH+HLahBw+MAhsw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-05-09 1:15 ` Chuck Lever
[not found] ` <1A79DEDE-A5C3-4581-A0AE-7C0AB056B4C7-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-05-09 2:11 ` Joonsoo Kim
2016-05-25 15:58 ` Chuck Lever
[not found] ` <1AFD636B-09FC-4736-B1C5-D1D9FA0B97B0-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-05-26 16:24 ` Yishai Hadas
[not found] ` <8a3276bf-f716-3dca-9d54-369fc3bdcc39-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2016-05-26 16:30 ` Bart Van Assche
[not found] ` <aaa67d51-663a-0aba-fc54-a5ab5d947a55-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-05-26 16:34 ` Chuck Lever
[not found] ` <C0AE237D-5E5A-4F94-B717-F3A3B4B4D4A8-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2016-05-26 16:48 ` Sagi Grimberg
[not found] ` <574728EC.9040802-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-05-26 17:19 ` Sagi Grimberg
[not found] ` <57473025.5020801-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-05-26 17:57 ` Chuck Lever
2016-05-26 19:23 ` Leon Romanovsky
[not found] ` <20160526192351.GV25500-2ukJVAZIZ/Y@public.gmane.org>
2016-05-26 20:12 ` Christoph Lameter
[not found] ` <alpine.DEB.2.20.1605261511230.8857-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2016-05-29 7:02 ` Sagi Grimberg [this message]
[not found] ` <574A941D.9050404-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-05-29 7:17 ` Christoph Hellwig
[not found] ` <20160529071749.GB24347-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-05-29 8:13 ` Sagi Grimberg
[not found] ` <574AA4BE.2060207-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-05-29 8:15 ` Christoph Hellwig
[not found] ` <20160529081527.GA5839-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-05-29 8:37 ` Sagi Grimberg
2016-05-31 15:14 ` Christoph Lameter
2016-05-29 7:10 ` Christoph Hellwig
[not found] ` <20160529071040.GA24347-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-05-29 8:56 ` Leon Romanovsky
2016-05-26 20:10 ` Christoph Lameter
2016-05-26 16:39 ` Leon Romanovsky
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