Allow deadlocks to be avoided in the AIO code by setting the pipe to
the I/O thread non-blocking.
Signed-off-by: Jeff Dike <[email protected]>
--
arch/um/os-Linux/aio.c | 5 +++++
1 file changed, 5 insertions(+)
Index: linux-2.6.21-mm/arch/um/os-Linux/aio.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/aio.c 2007-04-12 11:34:40.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/aio.c 2007-04-12 11:47:14.000000000 -0400
@@ -221,6 +221,11 @@ static int init_aio_24(void)
aio_req_fd_w = fds[0];
aio_req_fd_r = fds[1];
+
+ err = os_set_fd_block(aio_req_fd_w, 0);
+ if(err)
+ goto out_close_pipe;
+
err = run_helper_thread(not_aio_thread, NULL,
CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
if(err < 0)
-
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