ok, thanks. ________________________________ 发件人: Christian König <[email protected]> 发送时间: 2025年11月25日 15:52:18 收件人: 高翔; Xiang Gao; [email protected]; [email protected]; [email protected] 抄送: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected] 主题: Re: 答复: [External Mail]Re: [PATCH] dma-buf: add some tracepoints to debug.
[外部邮件] 此邮件来源于小米公司外部，请谨慎处理。若对邮件安全性存疑，请将邮件转发给[email protected]进行反馈 On 11/25/25 03:01, 高翔 wrote: >> In general quite nice to have, but this needs a bit more explanation why you >> need it. > > I want to track the status of dmabuf in real time in the production > environment. Please add that to the commit message. > >> I have strongly doubts that this is your legal name :) >> Please google the requirements for a Signed-off-by line. > That's my real name, gaoxiang. However, there are quite a few people with the > same name in the company, and I rank 17th. It doesn't matter what your eMail address is, but the name in a Signed-off-by must be your legal name. In other words the same what you would use on a contract, usually including first and last name. It could be that gaoxiang is perfectly fine in your restrication, but the number 17 certainly looks odd. > And the previous patches all used this name. > >> dmabuf->name can't be accessed without holding the appropriate lock, same of >> all other cases. > ok, thanks. It can be accessed with holding dmabuf->name_lock. That should work, yes. Regards, Christian. > > > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > *发件人:* Christian König <[email protected]> > *发送时间:* 2025年11月24日 22:21:57 > *收件人:* Xiang Gao; [email protected]; [email protected]; > [email protected] > *抄送:* [email protected]; [email protected]; > [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; > [email protected]; 高翔 > *主题:* [External Mail]Re: [PATCH] dma-buf: add some tracepoints to debug. > > [外部邮件] 此邮件来源于小米公司外部，请谨慎处理。若对邮件安全性存疑，请将邮件转发给[email protected]进行反馈 > > On 11/24/25 14:36, Xiang Gao wrote: >> From: gaoxiang17 <[email protected]> >> >> 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 <[email protected]> > > 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 <trace/events/dma_buf.h> >> + >> 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 <linux/dma-buf.h> >> +#include <linux/tracepoint.h> >> + >> +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 <trace/define_trace.h> >
