diff options
| author | Mohan Srinivasan <srmohan@google.com> | 2016-09-19 17:33:50 -0700 |
|---|---|---|
| committer | Runmin Wang <runminw@codeaurora.org> | 2017-04-17 10:31:20 -0700 |
| commit | bb4bf9d359f6c8f5ce24d546eed87f8c940f7921 (patch) | |
| tree | a8c92e6fec564d2274e262357c1c75946be477c6 /fs/mpage.c | |
| parent | 0293b8a7d07a2ef84bd227b81f20b966af900c51 (diff) | |
ANDROID: fs: FS tracepoints to track IO.
Adds tracepoints in ext4/f2fs/mpage to track readpages/buffered
write()s. This allows us to track files that are being read/written
to PIDs.
Change-Id: I26bd36f933108927d6903da04d8cb42fd9c3ef3d
Signed-off-by: Mohan Srinivasan <srmohan@google.com>
Git-commit: 32cbbe59538d2dd0b77822cc27ce32ca487c467d
Git-repo: https://android.googlesource.com/kernel/common/
[runminw@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Runmin Wang <runminw@codeaurora.org>
Diffstat (limited to 'fs/mpage.c')
| -rw-r--r-- | fs/mpage.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/mpage.c b/fs/mpage.c index 1480d3a18037..5c65d8942692 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -30,6 +30,14 @@ #include <linux/cleancache.h> #include "internal.h" +#define CREATE_TRACE_POINTS +#include <trace/events/android_fs.h> + +EXPORT_TRACEPOINT_SYMBOL(android_fs_datawrite_start); +EXPORT_TRACEPOINT_SYMBOL(android_fs_datawrite_end); +EXPORT_TRACEPOINT_SYMBOL(android_fs_dataread_start); +EXPORT_TRACEPOINT_SYMBOL(android_fs_dataread_end); + /* * I/O completion handler for multipage BIOs. * @@ -47,6 +55,16 @@ static void mpage_end_io(struct bio *bio) struct bio_vec *bv; int i; + if (trace_android_fs_dataread_end_enabled() && + (bio_data_dir(bio) == READ)) { + struct page *first_page = bio->bi_io_vec[0].bv_page; + + if (first_page != NULL) + trace_android_fs_dataread_end(first_page->mapping->host, + page_offset(first_page), + bio->bi_iter.bi_size); + } + bio_for_each_segment_all(bv, bio, i) { struct page *page = bv->bv_page; page_endio(page, bio_data_dir(bio), bio->bi_error); @@ -57,6 +75,18 @@ static void mpage_end_io(struct bio *bio) static struct bio *mpage_bio_submit(int rw, struct bio *bio) { + if (trace_android_fs_dataread_start_enabled() && (rw == READ)) { + struct page *first_page = bio->bi_io_vec[0].bv_page; + + if (first_page != NULL) { + trace_android_fs_dataread_start( + first_page->mapping->host, + page_offset(first_page), + bio->bi_iter.bi_size, + current->pid, + current->comm); + } + } bio->bi_end_io = mpage_end_io; guard_bio_eod(rw, bio); submit_bio(rw, bio); |