Hi Ted-san, Theodore Ts'o wrote: > Implement blkdev_releasepage() to release the buffer_heads and pages > after we release private data belonging to a mounted filesystem. > > Cc: Toshiyuki Okajima <toshi.okajima@xxxxxxxxxxxxxx> > Cc: linux-fsdevel@xxxxxxxxxxxxxxx > Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx> > --- > fs/block_dev.c | 15 +++++++++++++++ > fs/super.c | 2 ++ > include/linux/fs.h | 2 ++ > 3 files changed, 19 insertions(+), 0 deletions(-) I was confirming whether the kernel to which your new patch is applied can run without trouble. But unfortunately, I got a hangup problem. Now I am investigating the root cause. After I investigated it for a little time, I think calling log_wait_commit() from journal_try_to_free_buffers() can cause it. I examine it a little more in detail. Additional Info(Crash dump): Backtrace: crash> bt PID: 260 TASK: f71076d0 CPU: 1 COMMAND: "kswapd0" #0 [f707dcbc] schedule at c06346a3 #1 [f707dd34] log_wait_commit at f80904c1 #2 [f707dd70] journal_try_to_free_buffers at f808c81f #3 [f707dd94] blkdev_releasepage at c04916cc #4 [f707dda4] try_to_release_page at c04526b1 #5 [f707ddb0] shrink_page_list at c045b3d1 #6 [f707de50] shrink_list at c045b72e #7 [f707def0] shrink_zone at c045bbc6 #8 [f707df40] kswapd at c045c12c #9 [f707dfd8] kthread at c043612c #10 [f707dfe4] kernel_thread_helper at c04045e1 Sleep time: crash> ps -l | head -n 1 [5360808577593] PID: 7995 TASK: c98b76d0 CPU: 1 COMMAND: "crtfile" crash> ps -l 260 [3727586943566] PID: 260 TASK: f71076d0 CPU: 1 COMMAND: "kswapd0" crash> p (5360808577593 - 3727586943566)/1000000000 $4 = 1633 ======> 1633 seconds Best Regards, Toshiyuki Okajima -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
