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Hi, so here it is, LZ4 compression method inside btrfs. The patchset is based on top of current Chris'' for-linus + Andi''s snappy implementation + the fixes from Li Zefan. Passes xfstests and stresstests. I haven''t measured performance on wide range of hardware or workloads, rather wanted to publish the patches before I get distracted again. I''d like to ask

...+static int copy_args_to_argbuf(struct fuse_req *req) > +{ > + struct fuse_args *args = req->args; > + unsigned int offset = 0; > + unsigned int num_in; > + unsigned int num_out; > + unsigned int len; > + unsigned int i; > + > + num_in = args->in_numargs - args->in_pages; > + num_out = args->out_numargs - args->out_pages; > + len = fuse_len_args(num_in, (struct fuse_arg *) args->in_args) + > + fuse_len_args(num_out, args->out_args); > + > + req->argbuf = kmalloc(len, GFP_ATOMIC); > + if (!req->argbuf) > + return -ENOME...

...err = virtqueue_add_buf(chan->vq, outsg, insg, req->tc, GFP_ATOMIC); if (err < 0) { if (err == -ENOSPC) { chan->ring_bufs_avail = 0; @@ -356,6 +366,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, int in_nr_pages = 0, out_nr_pages = 0; struct page **in_pages = NULL, **out_pages = NULL; struct virtio_chan *chan = client->trans; + struct scatterlist *insg = NULL, *outsg = NULL; p9_debug(P9_DEBUG_TRANS, "virtio request\n"); @@ -403,6 +414,13 @@ req_retry_pinned: if (out_pages) out += pack_sg_list_p(chan->sg, out, VIRTQUEUE_NU...

...err = virtqueue_add_buf(chan->vq, outsg, insg, req->tc, GFP_ATOMIC); if (err < 0) { if (err == -ENOSPC) { chan->ring_bufs_avail = 0; @@ -356,6 +366,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, int in_nr_pages = 0, out_nr_pages = 0; struct page **in_pages = NULL, **out_pages = NULL; struct virtio_chan *chan = client->trans; + struct scatterlist *insg = NULL, *outsg = NULL; p9_debug(P9_DEBUG_TRANS, "virtio request\n"); @@ -403,6 +414,13 @@ req_retry_pinned: if (out_pages) out += pack_sg_list_p(chan->sg, out, VIRTQUEUE_NU...

...t, in, req->tc); + err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc, + GFP_ATOMIC); if (err < 0) { if (err == -ENOSPC) { chan->ring_bufs_avail = 0; @@ -413,7 +414,8 @@ req_retry_pinned: in += pack_sg_list_p(chan->sg, out + in, VIRTQUEUE_NUM, in_pages, in_nr_pages, uidata, inlen); - err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc); + err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc, + GFP_ATOMIC); if (err < 0) { if (err == -ENOSPC) { chan->ring_bufs_avail = 0; diff --git a/tools/vir...

...t, in, req->tc); + err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc, + GFP_ATOMIC); if (err < 0) { if (err == -ENOSPC) { chan->ring_bufs_avail = 0; @@ -413,7 +414,8 @@ req_retry_pinned: in += pack_sg_list_p(chan->sg, out + in, VIRTQUEUE_NUM, in_pages, in_nr_pages, uidata, inlen); - err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc); + err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc, + GFP_ATOMIC); if (err < 0) { if (err == -ENOSPC) { chan->ring_bufs_avail = 0; diff --git a/tools/vir...

OK, this is (ab)uses some of Paolo's patches. The first 7 are candidates for this merge window (maybe), the rest I'm not so sure about. Thanks, Rusty. Paolo Bonzini (3): scatterlist: introduce sg_unmark_end virtio-blk: reorganize virtblk_add_req virtio-blk: use virtqueue_add_sgs on req path Rusty Russell (13): virtio_ring: virtqueue_add_sgs, to add multiple sgs. virtio-blk:

OK, this is (ab)uses some of Paolo's patches. The first 7 are candidates for this merge window (maybe), the rest I'm not so sure about. Thanks, Rusty. Paolo Bonzini (3): scatterlist: introduce sg_unmark_end virtio-blk: reorganize virtblk_add_req virtio-blk: use virtqueue_add_sgs on req path Rusty Russell (13): virtio_ring: virtqueue_add_sgs, to add multiple sgs. virtio-blk:

From: John Hubbard <jhubbard at nvidia.com> Hi, This is mostly Jerome's work, converting the block/bio and related areas to call put_user_page*() instead of put_page(). Because I've changed Jerome's patches, in some cases significantly, I'd like to get his feedback before we actually leave him listed as the author (he might want to disown some or all of these). I added a

From: John Hubbard <jhubbard at nvidia.com> Hi, This is mostly Jerome's work, converting the block/bio and related areas to call put_user_page*() instead of put_page(). Because I've changed Jerome's patches, in some cases significantly, I'd like to get his feedback before we actually leave him listed as the author (he might want to disown some or all of these). I added a

Add virtqueue_add_sgs which is more general than virtqueue_add_buf, which makes virtio-scsi and virtio-blk nicer, then add virtqueue_add_inbuf and virtqueue_add_outbuf which handle the more general case, and finally delete virtqueue_add_buf(). I'm hoping this will be the final post of the whole series, and it can move from my pending-rebases tree into virtio-next. Thanks! Rusty. Paolo

Add virtqueue_add_sgs which is more general than virtqueue_add_buf, which makes virtio-scsi and virtio-blk nicer, then add virtqueue_add_inbuf and virtqueue_add_outbuf which handle the more general case, and finally delete virtqueue_add_buf(). I'm hoping this will be the final post of the whole series, and it can move from my pending-rebases tree into virtio-next. Thanks! Rusty. Paolo