Hi, Dominique Martinet wrote on Fri, Jan 17, 2014 : > We need barriers to guarantee this pattern works as intended: > [w] req->rc, 1 [r] req->status, 1 > wmb rmb > [w] req->status, 1 [r] req->rc > > Where the wmb ensures that rc gets written before status, > and the rmb ensures that if you observe status == 1, rc is the new value. > > Signed-off-by: Dominique Martinet <dominique.martinet@xxxxxx> > --- > include/net/9p/client.h | 2 +- > net/9p/client.c | 16 +++++++++++++++- > net/9p/trans_fd.c | 15 ++++++--------- > net/9p/trans_rdma.c | 3 +-- > net/9p/trans_virtio.c | 3 +-- > 5 files changed, 24 insertions(+), 15 deletions(-) Reminder to get some attention now that the pull request for merge window has passed :) Please ask if this needs a resend, but should still apply as is. Would be particularily nice to get confirmation that this doesn't slow everything down for tcp/virtio folk or raises another kind of blocker (although I have nothing better short of another transport-specific function call after the p9_client_rpc wait is over, which is worse than this to me, but suggestions are always welcome!) Cheers, -- Dominique Martinet -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
