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dump page_pinner information into bugreport

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Dump page_pinner information into dumpstate_board.txt.
It helps to find vulnerable place of CMA failure.

Page pinned ts 13 us count 0
PFN 10292273 Block 10051 type CMA Flags 0x8000000000080024(uptodate|active|swapbacked)
 try_grab_page+0x168/0x17c
 follow_page_pte+0x2e4/0x4c8
 follow_pmd_mask+0x180/0x498
 __get_user_pages+0x1a0/0x42c
 __get_user_pages_remote+0xa4/0x28c
 get_user_pages_remote+0x20/0x48
 copy_strings+0x188/0x2ac
 do_execveat_common+0x278/0x300
 __arm64_sys_execve+0x44/0x5c
 el0_svc_common+0xa4/0x180
 do_el0_svc+0x28/0x88
 el0_svc+0x14/0x24
 el0_sync_handler+0x88/0xec
 el0_sync+0x19c/0x1c0

Page pinned ts 2 us count 0
PFN 10436170 Block 10191 type CMA Flags 0x8000000000080026(referenced|uptodate|active|swapbacked)
 try_grab_page+0x168/0x17c
 follow_page_pte+0x2e4/0x4c8
 follow_pmd_mask+0x180/0x498
 __get_user_pages+0x1a0/0x42c
 __get_user_pages_remote+0xa4/0x28c
 get_user_pages_remote+0x20/0x48
 copy_strings+0x188/0x2ac
 do_execveat_common+0x290/0x300
 __arm64_sys_execve+0x44/0x5c
 el0_svc_common+0xa4/0x180
 do_el0_svc+0x28/0x88
 el0_svc+0x14/0x24
 el0_sync_handler+0x88/0xec
 el0_sync+0x19c/0x1c0

Bug: 226956571
Test: adb bugreport <zip> and confirmed it contains page_pinner
      information.
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: Iaf5cd9b70116ed5fff9351dcdcc5485aef18063f
This commit is contained in:
Minchan Kim 2022-03-25 12:48:16 -07:00 • committed by TreeHugger Robot
parent f980e770bd
commit ec97992b78
1 changed files with 2 additions and 0 deletions
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2
dumpstate/DumpstateDevice.cpp
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@ -832,6 +832,8 @@ void DumpstateDevice::dumpMemorySection(int fd) {
"fi; "
"done"});
DumpFileToFd(fd, "dmabuf info", "/d/dma_buf/bufinfo");
DumpFileToFd(fd, "Page Pinner - longterm pin", "/sys/kernel/debug/page_pinner/longterm_pinner");
DumpFileToFd(fd, "Page Pinner - alloc_contig_failed", "/sys/kernel/debug/page_pinner/alloc_contig_failed");
}
static void DumpF2FS(int fd) {