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push down vector linearization to posix-aio-compat.c (Christoph Hellwig)
Make all AIO requests vectored and defer linearization until the actualI/O thread. This prepares for using native preadv/pwritev.
Also enables asynchronous direct I/O by handling that case in the I/O thread....
new scsi-generic abstraction, use SG_IO (Christoph Hellwig)
Okay, I started looking into how to handle scsi-generic I/O in thenew world order.
I think the best is to use the SG_IO ioctl instead of the read/writeinterface as that allows us to support scsi passthrough on disk/cdrom...
Rename sigev_signo to avoid FreeBSD problems (Juergen Lock)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6414 c046a42c-6fe2-441c-8c8c-71466251a162
Use kill instead of sigqueue: re-enables AIO on OpenBSD
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6360 c046a42c-6fe2-441c-8c8c-71466251a162
Replace posix-aio with custom thread pool
glibc implements posix-aio as a thread pool and imposes a number of limitations.
1) it limits one request per-file descriptor. we hack around this by dup()'ingfile descriptors which is hideously ugly
2) it's impossible to add new interfaces and we need a vectored read/write...