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uml: aIO deadlock avoidance

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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 <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike
2007-05-06 14:51:44 -07:00
committed by Linus Torvalds
parent a6ea4cceed
commit 8603ec8148
1 changed files with 5 additions and 0 deletions
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5
arch/um/os-Linux/aio.c
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@@ -221,6 +221,11 @@ static int init_aio_24(void)
aio_req_fd_w = fds[0]; aio_req_fd_w = fds[0];
aio_req_fd_r = fds[1]; 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, err = run_helper_thread(not_aio_thread, NULL,
CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0); CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
if(err < 0) if(err < 0)