Jeff, Blaisor, you're exactly right. Linux aio uses io_submit, not
aio_read, it seems. aio_read calls clone to make a new thread to do its
"aio". Thank you all for your help.
Allan
Jeff Dike wrote:
Tracing the aio_read() through the UML kernel finally gets me here:
#0 sys_pread64 (fd=3, buf=0xbf7c8f20 "", count=1024, pos=0)
at fs/read_write.c:354
#1 0x08062ff8 in execute_syscall_skas (r=0x12374864)
at arch/um/kernel/skas/syscall_kern.c:29
Finally? That's the very beginning of the system call (or the very end).
The UML block device doesn't know about AIO. All it does is get blocks from
a disk.
Are you sure you're getting kernel AIO and not the libc emulation of it?
Jeff
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