Ken Chen writes:
> So any error value returned from invalidate_inode_pages2_range() has
> to be taken seriously in the direct IO submit path instead of dropping
> it to the floor.
If invalidate_inode_pages2_range() will return EIOCBRETRY as the patch
"aio: fix kernel bug when page is temporally busy"
serts then do_sync_read/write() will not drop IO submit but will retry
it:
for (;;) {
ret = filp->f_op->aio_read(&kiocb, &iov, 1,
kiocb.ki_pos);
if (ret != -EIOCBRETRY)
break;
wait_on_retry_sync_kiocb(&kiocb);
}
And do_sync_read/write() will not return EIO if page is busy as it does
now, befor patching.
Curretly do_sync_read/write() tests for EIOCBRETRY. But EIOCBRETRY is
not set ever.
Leonid
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