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From: Christoph Hellwig <hch@lst.de>
To: Boaz Harrosh <boaz@plexistor.com>
Cc: linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	ross.zwisler@linux.intel.com, axboe@kernel.dk
Subject: Re: another pmem variant V2
Date: Thu, 26 Mar 2015 18:18:58 +0100	[thread overview]
Message-ID: <20150326171858.GA25575@lst.de> (raw)
In-Reply-To: <55143A8B.2060304@plexistor.com>

On Thu, Mar 26, 2015 at 06:57:47PM +0200, Boaz Harrosh wrote:
> For one this auto discovery of yours is very (very) nice but is a bit
> inconvenience. Before I would reserve a big chuck on each NUMA range
> on Kernel's memmap=  And then at pmem map= would slice and dice it
> as I want hot style on modprobe with no need for reboot. Now I need
> to do it on reboot theoretically. (You know xfstest needs lots of devices
> some big some small ;-))

Slicing up a block device based on kernel options is not exactly a smart
idea.  We have partitions that are perfectly fine for that.  If you
really don't are about persistance of your partitioning you can just
set up a device mapper table.  No need to reinvent the wheel.

> Also with the modprob pmem map= I was supporting a PCIE memory card but
> I guess I need to throw this one out the door.

Send it my way to support it properly...  Just like any other PCIe device it
should have a proper driver.  For now it can register a pmem platform device,
but when you submit it I'd rather add slightly more low-level versions
of pmem_probe and pmem_remove that take a struct device * and possibly
a resource structure so that you can directly call into it.

  parent reply	other threads:[~2015-03-26 17:19 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-26  8:32 another pmem variant V2 Christoph Hellwig
2015-03-26  8:32 ` [PATCH 1/3] pmem: Initial version of persistent memory driver Christoph Hellwig
2015-03-26 14:12   ` [Linux-nvdimm] " Dan Williams
2015-03-26 14:35     ` Christoph Hellwig
2015-03-26 21:37       ` Ross Zwisler
2015-03-26 14:52     ` Boaz Harrosh
2015-03-26 15:59       ` Dan Williams
2015-03-26  8:32 ` [PATCH 2/3] x86: add a is_e820_ram() helper Christoph Hellwig
2015-03-26  9:02   ` Ingo Molnar
2015-03-26  9:34     ` Christoph Hellwig
2015-03-26 10:04       ` Ingo Molnar
2015-03-26 10:19         ` Christoph Hellwig
2015-03-26 10:28           ` Ingo Molnar
2015-03-26 10:29             ` Christoph Hellwig
2015-03-26 15:49       ` Boaz Harrosh
2015-03-26 16:02         ` [Linux-nvdimm] " Dan Williams
2015-03-26 16:07           ` Boaz Harrosh
2015-03-26 16:43         ` Christoph Hellwig
2015-03-26 18:46           ` Elliott, Robert (Server Storage)
2015-03-26 19:25             ` [Linux-nvdimm] " Dan Williams
2015-03-26 20:53           ` Ross Zwisler
2015-03-26 22:59       ` Yinghai Lu
2015-03-27  8:10         ` Christoph Hellwig
2015-03-26  8:32 ` [PATCH 3/3] x86: add support for the non-standard protected e820 type Christoph Hellwig
2015-03-26 16:57 ` another pmem variant V2 Boaz Harrosh
2015-03-26 17:02   ` [PATCH] SQUASHME: Streamline pmem.c Boaz Harrosh
2015-03-26 17:23     ` Christoph Hellwig
2015-03-26 22:17     ` Ross Zwisler
2015-03-26 22:22     ` Ross Zwisler
2015-03-26 23:31     ` [Linux-nvdimm] " Dan Williams
2015-03-31 13:44       ` Boaz Harrosh
2015-03-26 17:18   ` Christoph Hellwig [this message]
2015-03-26 17:31     ` another pmem variant V2 Boaz Harrosh
2015-03-26 18:38       ` Christoph Hellwig
2015-03-31  9:25   ` Christoph Hellwig
2015-03-31 10:25     ` Boaz Harrosh
2015-03-31 10:31       ` Boaz Harrosh
2015-03-31 14:21       ` [RFC] SQUASHME: pmem: Split up pmem_probe from pmem_alloc Boaz Harrosh
2015-03-31 16:10         ` Christoph Hellwig
2015-03-31 16:08       ` another pmem variant V2 Christoph Hellwig
2015-03-31 13:18     ` [SQUASHME 0/6] Streamline of Initial pmem submission Boaz Harrosh
2015-03-31 13:23       ` [PATCH 1/6] SQUASHME: Don't let e820_PMEM sections Boaz Harrosh
2015-03-31 17:16         ` [Linux-nvdimm] " Brooks, Adam J
2015-03-31 13:24       ` [PATCH 2/6] SQUASHME: pmem: Remove getgeo Boaz Harrosh
2015-03-31 13:25       ` [PATCH 3/6] SQUASHME: pmem: Streamline pmem driver Boaz Harrosh
2015-03-31 13:27       ` [PATCH 4/6] SQUSHME: pmem: Micro cleaning Boaz Harrosh
2015-03-31 15:17         ` [Linux-nvdimm] " Dan Williams
2015-03-31 15:24           ` Boaz Harrosh
2015-03-31 15:30             ` Dan Williams
2015-03-31 15:43               ` Boaz Harrosh
2015-03-31 19:40                 ` Matthew Wilcox
2015-03-31 13:28       ` [PATCH 5/6] SQUASHME: pmem: Remove SECTOR_SHIFT Boaz Harrosh
2015-03-31 13:33       ` [PATCH 6/6] SQUASHME: pmem: Remove "... based on brd.c" + Copyright Boaz Harrosh
2015-03-31 15:14     ` another pmem variant V2 Boaz Harrosh
2015-03-31 16:16       ` Christoph Hellwig
2015-03-31 16:44         ` Ingo Molnar
2015-03-31 17:24           ` Christoph Hellwig
2015-03-31 17:33             ` [Linux-nvdimm] " Dan Williams
2015-04-01  7:50               ` Ingo Molnar
2015-04-01  8:06                 ` Boaz Harrosh
2015-04-01 12:49         ` Boaz Harrosh
2015-03-31 22:11 ` Elliott, Robert (Server Storage)
2015-04-01  7:26   ` Christoph Hellwig
2015-04-02 15:11     ` Elliott, Robert (Server Storage)
2015-04-02 16:41       ` Christoph Hellwig
2015-04-02 18:03         ` Ingo Molnar
2015-04-02 18:03           ` Ingo Molnar
2015-04-01 19:33 ` Elliott, Robert (Server Storage)
2015-04-02  9:37   ` Christoph Hellwig
2015-03-26 18:38 Christoph Hellwig

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