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From: "Thomas Hellström (VMware)" <thomas_os@shipmail.org>
To: Hillf Danton <hdanton@sina.com>,
	Thomas Hellstrom <thellstrom@vmware.com>
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-mm@kvack.org, pv-drivers@vmware.com,
	linux-graphics-maintainer@vmware.com,
	Andrew Morton <akpm@linux-foundation.org>,
	Matthew Wilcox <willy@infradead.org>,
	Will Deacon <will.deacon@arm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Rik van Riel <riel@surriel.com>, Minchan Kim <minchan@kernel.org>,
	Michal Hocko <mhocko@suse.com>, Huang Ying <ying.huang@intel.com>,
	Souptick Joarder <jrdr.linux@gmail.com>,
	jglisse@redhat.com, christian.koenig@amd.com,
	Christoph Hellwig <hch@infradead.org>
Subject: Re: [RFC PATCH 3/7] drm/ttm: TTM fault handler helpers
Date: Fri, 13 Sep 2019 16:34:02 +0200
Message-ID: <f26f6096-8d11-82e4-390c-d110af8fdc49@shipmail.org> (raw)
In-Reply-To: <20190913134039.3164-1-hdanton@sina.com>

On 9/13/19 3:40 PM, Hillf Danton wrote:
> On Fri, 13 Sep 2019 11:32:09 +0200
>>   	err = ttm_mem_io_lock(man, true);
>> -	if (unlikely(err != 0)) {
>> -		ret = VM_FAULT_NOPAGE;
>> -		goto out_unlock;
>> -	}
>> +	if (unlikely(err != 0))
>> +		return VM_FAULT_NOPAGE;
>>   	err = ttm_mem_io_reserve_vm(bo);
>> -	if (unlikely(err != 0)) {
>> -		ret = VM_FAULT_SIGBUS;
>> -		goto out_io_unlock;
>> -	}
>> +	if (unlikely(err != 0))
>> +		return VM_FAULT_SIGBUS;
>>
> Hehe, no hurry.

Could you be a bit more specific?

Thanks,

Thomas



>
>> @@ -295,8 +307,28 @@ static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
>>   	ret = VM_FAULT_NOPAGE;
>>   out_io_unlock:
>>   	ttm_mem_io_unlock(man);
>> -out_unlock:
>> +	return ret;
>> +}
>> +EXPORT_SYMBOL(ttm_bo_vm_fault_reserved);




  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-13  9:32 [RFC PATCH 0/7] Emulated coherent graphics memory take 2 Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 1/7] mm: Add write-protect and clean utilities for address space ranges Thomas Hellström (VMware)
2019-09-13 11:11   ` Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 2/7] drm/ttm: Allow the driver to provide the ttm struct vm_operations_struct Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 3/7] drm/ttm: TTM fault handler helpers Thomas Hellström (VMware)
2019-09-13 15:18   ` Matthew Wilcox
2019-09-13 16:08     ` Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 4/7] drm/vmwgfx: Implement an infrastructure for write-coherent resources Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 5/7] drm/vmwgfx: Use an RBtree instead of linked list for MOB resources Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 6/7] drm/vmwgfx: Implement an infrastructure for read-coherent resources Thomas Hellström (VMware)
2019-09-13  9:32 ` [RFC PATCH 7/7] drm/vmwgfx: Add surface dirty-tracking callbacks Thomas Hellström (VMware)
2019-09-13 13:40 ` [RFC PATCH 3/7] drm/ttm: TTM fault handler helpers Hillf Danton
2019-09-13 14:34   ` Thomas Hellström (VMware) [this message]
2019-09-13 16:23   ` Thomas Hellström (VMware)

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