From: Felix Kuehling <felix.kuehling@amd.com>
To: amd-gfx@lists.freedesktop.org, "Yang, Philip" <Philip.Yang@amd.com>
Subject: Re: [PATCH 2/2] drm/amdkfd: set new unregistered range accessible by GPU
Date: Wed, 5 May 2021 16:03:44 -0400 [thread overview]
Message-ID: <96378cfe-61ae-2a09-de25-ee65ad11e0ef@amd.com> (raw)
In-Reply-To: <20210505175617.30404-2-Philip.Yang@amd.com>
Am 2021-05-05 um 1:56 p.m. schrieb Philip Yang:
> GPU retry vm fault on unregistered address, new range is created to
> recover the retry vm fault. Instead of setting new range perferred_loc
> to GPU, add GPU to new range access_bitmap, to be able to update GPU
> page table after new range migrate to VRAM. The new range preferred_loc
> is default value KFD_IOCTL_SVM_LOCATION_UNDEFINED.
>
> Correct one typo.
>
> Signed-off-by: Philip Yang <Philip.Yang@amd.com>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> index 3b640772d9c5..5a486e0fbf18 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> @@ -2243,7 +2243,7 @@ svm_range *svm_range_create_unregistered_range(struct amdgpu_device *adev,
>
> prange = svm_range_new(&p->svms, start, last);
> if (!prange) {
> - pr_debug("Failed to create prange in address [0x%llx]\\n", addr);
> + pr_debug("Failed to create prange in address [0x%llx]\n", addr);
> return NULL;
> }
> if (kfd_process_gpuid_from_kgd(p, adev, &gpuid, &gpuidx)) {
> @@ -2251,9 +2251,8 @@ svm_range *svm_range_create_unregistered_range(struct amdgpu_device *adev,
> svm_range_free(prange);
> return NULL;
> }
> - prange->preferred_loc = gpuid;
> - prange->actual_loc = 0;
> - /* Gurantee prange is migrate it */
> +
> + bitmap_set(prange->bitmap_access, gpuidx, 1);
By default, with XNACK enabled, the default should be that all GPUs have
access to memory (but not access in place).
Regards,
Felix
> svm_range_add_to_svms(prange);
> svm_range_add_notifier_locked(mm, prange);
>
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next prev parent reply other threads:[~2021-05-05 20:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-05 17:56 [PATCH 1/2] drm/amdkfd: set prefetch GPU has access attribute Philip Yang
2021-05-05 17:56 ` [PATCH 2/2] drm/amdkfd: set new unregistered range accessible by GPU Philip Yang
2021-05-05 20:03 ` Felix Kuehling [this message]
2021-05-07 19:07 ` [PATCH 2/2] drm/amdkfd: unregistered range accessible by all GPUs Philip Yang
2021-05-10 12:56 ` Felix Kuehling
2021-05-11 15:14 ` philip yang
2021-05-11 15:15 ` [PATCH v2 2/2] drm/amdkfd: new " Philip Yang
2021-05-11 15:39 ` Felix Kuehling
2021-05-05 20:01 ` [PATCH 1/2] drm/amdkfd: set prefetch GPU has access attribute Felix Kuehling
2021-05-05 20:10 ` Felix Kuehling
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