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shm: print performance warning when FALLOC_FL_PUNCH_HOLE isn't supported

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Daniel Eklöf 2020-03-22 21:04:00 +01:00
parent 7404ace40c
commit 795b0e7ea1
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GPG key ID: 5BBD4992C116573F
1 changed files with 6 additions and 3 deletions
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shm.c
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@ -233,6 +233,12 @@ shm_get_buffer(struct wl_shm *shm, int width, int height, unsigned long cookie)
can_punch_hole_initialized = true; can_punch_hole_initialized = true;
can_punch_hole = fallocate( can_punch_hole = fallocate(
pool_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1) == 0; pool_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1) == 0;
if (!can_punch_hole) {
LOG_WARN(
"fallocate(FALLOC_FL_PUNCH_HOLE) not "
"supported (%s): expect lower performance", strerror(errno));
}
} }
/* Push to list of available buffers, but marked as 'busy' */ /* Push to list of available buffers, but marked as 'busy' */
@ -324,9 +330,6 @@ shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows)
/* Free unused memory */ /* Free unused memory */
if (fallocate(buf->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, new_offset) < 0) { if (fallocate(buf->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, new_offset) < 0) {
LOG_ERRNO(
"fallocate(FALLOC_FL_PUNCH_HOLE) not "
"supported: expect lower performance");
abort(); abort();
} }