path: root/crypto
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authorRoland Dreier <>2011-03-22 16:35:10 -0700
committerLinus Torvalds <>2011-03-22 17:44:17 -0700
commite91f90bb0bb10be9cc8efd09a3cf4ecffcad0db1 (patch)
treebd9c134e875a3a96a5f96bbde9a112c180ba3d4f /crypto
parent77d1c8eb8a8e0989f4c46e9a40bbd4185d34974e (diff)
aio: wake all waiters when destroying ctx
The test program below will hang because io_getevents() uses add_wait_queue_exclusive(), which means the wake_up() in io_destroy() only wakes up one of the threads. Fix this by using wake_up_all() in the aio code paths where we want to make sure no one gets stuck. // t.c -- compile with gcc -lpthread -laio t.c #include <libaio.h> #include <pthread.h> #include <stdio.h> #include <unistd.h> static const int nthr = 2; void *getev(void *ctx) { struct io_event ev; io_getevents(ctx, 1, 1, &ev, NULL); printf("io_getevents returned\n"); return NULL; } int main(int argc, char *argv[]) { io_context_t ctx = 0; pthread_t thread[nthr]; int i; io_setup(1024, &ctx); for (i = 0; i < nthr; ++i) pthread_create(&thread[i], NULL, getev, ctx); sleep(1); io_destroy(ctx); for (i = 0; i < nthr; ++i) pthread_join(thread[i], NULL); return 0; } Signed-off-by: Roland Dreier <> Reviewed-by: Jeff Moyer <> Cc: <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions