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To: Xiang Gao , sumit.semwal@linaro.org, rostedt@goodmis.org, mhiramat@kernel.org Cc: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, dhowells@redhat.com, kuba@kernel.org, brauner@kernel.org, akpm@linux-foundation.org, linux-trace-kernel@vger.kernel.org, gaoxiang17 References: <20251124133648.72668-1-gxxa03070307@gmail.com> Content-Language: en-US From: =?UTF-8?Q?Christian_K=C3=B6nig?= In-Reply-To: <20251124133648.72668-1-gxxa03070307@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BN9PR03CA0282.namprd03.prod.outlook.com (2603:10b6:408:f5::17) To PH7PR12MB5685.namprd12.prod.outlook.com (2603:10b6:510:13c::22) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: 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X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Nov 2025 14:22:02.6511 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 3y6mhYTYARPcO9Hb8X4g+bYv6Y0E2GG/30Pdo0L5uzpUTNxBiLvhifKzQ3NewFQu X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6077 On 11/24/25 14:36, Xiang Gao wrote: > From: gaoxiang17 > > With these tracepoints, we can track dmabuf in real time. > > For example: > binder:3025_3-10524 [000] ..... 553.310313: dma_buf_export: exp_name=qcom,system name=(null) size=12771328 ino=2799 > binder:3025_3-10524 [000] ..... 553.310318: dma_buf_fd: exp_name=qcom,system name=(null) size=12771328 ino=2799 fd=8 > RenderThread-9307 [000] ..... 553.310869: dma_buf_get: exp_name=qcom,system name=blastBufferQueue for scaleUpDow size=12771328 ino=2799 fd=673 f_ref=4 > RenderThread-9307 [000] ..... 553.310871: dma_buf_attach: dev_name=kgsl-3d0 exp_name=qcom,system name=blastBufferQueue for scaleUpDow size=12771328 ino=2799 > RenderThread-9307 [000] ..... 553.310946: dma_buf_mmap_internal: exp_name=qcom,system name=blastBufferQueue for scaleUpDow size=12771328 ino=2799 > RenderThread-9307 [004] ..... 553.315084: dma_buf_detach: exp_name=qcom,system name=blastBufferQueue for scaleUpDow size=12771328 ino=2799 > RenderThread-9307 [004] ..... 553.315084: dma_buf_put: exp_name=qcom,system name=blastBufferQueue for scaleUpDow size=12771328 ino=2799 f_ref=5 In general quite nice to have, but this needs a bit more explanation why you need it. > > Signed-off-by: gaoxiang17 I have strongly doubts that this is your legal name :) Please google the requirements for a Signed-off-by line. > --- > drivers/dma-buf/dma-buf.c | 19 +++ > include/trace/events/dma_buf.h | 245 +++++++++++++++++++++++++++++++++ > 2 files changed, 264 insertions(+) > create mode 100644 include/trace/events/dma_buf.h > > diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c > index 2bcf9ceca997..8b5af73f0218 100644 > --- a/drivers/dma-buf/dma-buf.c > +++ b/drivers/dma-buf/dma-buf.c > @@ -35,6 +35,9 @@ > > #include "dma-buf-sysfs-stats.h" > > +#define CREATE_TRACE_POINTS > +#include > + > static inline int is_dma_buf_file(struct file *); > > static DEFINE_MUTEX(dmabuf_list_mutex); > @@ -220,6 +223,8 @@ static int dma_buf_mmap_internal(struct file *file, struct vm_area_struct *vma) > dmabuf->size >> PAGE_SHIFT) > return -EINVAL; > > + trace_dma_buf_mmap_internal(dmabuf); > + > return dmabuf->ops->mmap(dmabuf, vma); > } > > @@ -745,6 +750,8 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info) > > __dma_buf_list_add(dmabuf); > > + trace_dma_buf_export(dmabuf); > + > return dmabuf; > > err_dmabuf: > @@ -779,6 +786,8 @@ int dma_buf_fd(struct dma_buf *dmabuf, int flags) > > fd_install(fd, dmabuf->file); > > + trace_dma_buf_fd(dmabuf, fd); > + > return fd; > } > EXPORT_SYMBOL_NS_GPL(dma_buf_fd, "DMA_BUF"); > @@ -805,6 +814,8 @@ struct dma_buf *dma_buf_get(int fd) > return ERR_PTR(-EINVAL); > } > > + trace_dma_buf_get(fd, file); > + > return file->private_data; > } > EXPORT_SYMBOL_NS_GPL(dma_buf_get, "DMA_BUF"); > @@ -825,6 +836,8 @@ void dma_buf_put(struct dma_buf *dmabuf) > return; > > fput(dmabuf->file); > + > + trace_dma_buf_put(dmabuf); > } > EXPORT_SYMBOL_NS_GPL(dma_buf_put, "DMA_BUF"); > > @@ -998,6 +1011,8 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_dynamic_attach, "DMA_BUF"); > struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, > struct device *dev) > { > + trace_dma_buf_attach(dmabuf, dev); > + > return dma_buf_dynamic_attach(dmabuf, dev, NULL, NULL); > } > EXPORT_SYMBOL_NS_GPL(dma_buf_attach, "DMA_BUF"); > @@ -1024,6 +1039,8 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) > dmabuf->ops->detach(dmabuf, attach); > > kfree(attach); > + > + trace_dma_buf_detach(dmabuf); > } > EXPORT_SYMBOL_NS_GPL(dma_buf_detach, "DMA_BUF"); > > @@ -1488,6 +1505,8 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, > vma_set_file(vma, dmabuf->file); > vma->vm_pgoff = pgoff; > > + trace_dma_buf_mmap(dmabuf); > + > return dmabuf->ops->mmap(dmabuf, vma); > } > EXPORT_SYMBOL_NS_GPL(dma_buf_mmap, "DMA_BUF"); > diff --git a/include/trace/events/dma_buf.h b/include/trace/events/dma_buf.h > new file mode 100644 > index 000000000000..796ae444f6ae > --- /dev/null > +++ b/include/trace/events/dma_buf.h > @@ -0,0 +1,245 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM dma_buf > + > +#if !defined(_TRACE_DMA_BUF_H) || defined(TRACE_HEADER_MULTI_READ) > +#define _TRACE_DMA_BUF_H > + > +#include > +#include > + > +TRACE_EVENT(dma_buf_export, > + > + TP_PROTO(struct dma_buf *dmabuf), > + > + TP_ARGS(dmabuf), > + > + TP_STRUCT__entry( > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) dmabuf->name can't be accessed without holding the appropriate lock, same of all other cases. Regards, Christian. > + __field(size_t, size) > + __field(ino_t, ino) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino) > +); > + > +TRACE_EVENT(dma_buf_fd, > + > + TP_PROTO(struct dma_buf *dmabuf, int fd), > + > + TP_ARGS(dmabuf, fd), > + > + TP_STRUCT__entry( > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) > + __field(size_t, size) > + __field(ino_t, ino) > + __field(int, fd) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + __entry->fd = fd; > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu fd=%d", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino, > + __entry->fd) > +); > + > +TRACE_EVENT(dma_buf_mmap_internal, > + > + TP_PROTO(struct dma_buf *dmabuf), > + > + TP_ARGS(dmabuf), > + > + TP_STRUCT__entry( > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) > + __field(size_t, size) > + __field(ino_t, ino) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino) > +); > + > +TRACE_EVENT(dma_buf_mmap, > + > + TP_PROTO(struct dma_buf *dmabuf), > + > + TP_ARGS(dmabuf), > + > + TP_STRUCT__entry( > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) > + __field(size_t, size) > + __field(ino_t, ino) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino) > +); > + > +TRACE_EVENT(dma_buf_attach, > + > + TP_PROTO(struct dma_buf *dmabuf, struct device *dev), > + > + TP_ARGS(dmabuf, dev), > + > + TP_STRUCT__entry( > + __string(dname, dev_name(dev)) > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) > + __field(size_t, size) > + __field(ino_t, ino) > + ), > + > + TP_fast_assign( > + __assign_str(dname); > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + ), > + > + TP_printk("dev_name=%s exp_name=%s name=%s size=%zu ino=%lu", > + __get_str(dname), > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino) > +); > + > +TRACE_EVENT(dma_buf_detach, > + > + TP_PROTO(struct dma_buf *dmabuf), > + > + TP_ARGS(dmabuf), > + > + TP_STRUCT__entry( > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) > + __field(size_t, size) > + __field(ino_t, ino) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino) > +); > + > +TRACE_EVENT(dma_buf_get, > + > + TP_PROTO(int fd, struct file *file), > + > + TP_ARGS(fd, file), > + > + TP_STRUCT__entry( > + __string(exp_name, ((struct dma_buf *)file->private_data)->exp_name) > + __string(name, ((struct dma_buf *)file->private_data)->name) > + __field(size_t, size) > + __field(ino_t, ino) > + __field(int, fd) > + __field(long, f_ref) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = ((struct dma_buf *)file->private_data)->size; > + __entry->ino = ((struct dma_buf *)file->private_data)->file->f_inode->i_ino; > + __entry->fd = fd; > + __entry->f_ref = file_ref_get(&file->f_ref); > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu fd=%d f_ref=%ld", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino, > + __entry->fd, > + __entry->f_ref) > +); > + > +TRACE_EVENT(dma_buf_put, > + > + TP_PROTO(struct dma_buf *dmabuf), > + > + TP_ARGS(dmabuf), > + > + TP_STRUCT__entry( > + __string(exp_name, dmabuf->exp_name) > + __string(name, dmabuf->name) > + __field(size_t, size) > + __field(ino_t, ino) > + __field(long, f_ref) > + ), > + > + TP_fast_assign( > + __assign_str(exp_name); > + __assign_str(name); > + __entry->size = dmabuf->size; > + __entry->ino = dmabuf->file->f_inode->i_ino; > + __entry->f_ref = file_ref_get(&dmabuf->file->f_ref); > + ), > + > + TP_printk("exp_name=%s name=%s size=%zu ino=%lu f_ref=%ld", > + __get_str(exp_name), > + __get_str(name), > + __entry->size, > + __entry->ino, > + __entry->f_ref) > +); > + > +#endif /* _TRACE_DMA_BUF_H */ > + > +/* This part must be outside protection */ > +#include