search for: iov_iter_revert

The following patches were made over Linus's tree and fix an issue where windows guests will send iovecs with offset/lengths that result in IOs that are not aligned to 512. The LIO layer will then send them to Linux's FS/block layer but it requires 512 byte alignment, so depending on the FS/block driver being used we will get IO errors or hung IO. The following patches have vhost-scsi

...that just the spinlock suffices. The following few patches make the main pipe read/write routines use the spinlock so as not to be interfered with by notification insertion. I didn't roll the spinlock out to splice and suchlike since I prohibit splicing to a notifications pipe because of the iov_iter_revert() fun. David