On Tue, Oct 04, 2016 at 09:29:35AM -0400, CAI Qian wrote: > > Is there any way to record the sequence of syscalls leading to that? > > > Yes, a bit long shot though. > > http://people.redhat.com/qcai/tmp/trinity-child113.log ;-/ Not enough information, unfortunately (descriptor in question opened outside of that log, sendfile(out_fd=578, in_fd=578, offset=0x7f8318a07000, count=0x3ffc00) doesn't tell what *offset was before the call) ;-/ Anyway, I've found and fixed a bug in pipe_advance(), which might or might not help with those. Could you try vfs.git#work.splice_read (or #for-next) and see if these persist? -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html