aoe: update cap on outstanding commands based on config query response (1b8a1636) · Commits · 戴 / test

The ATA over Ethernet config query response contains a "buffer count" field reflecting the AoE target's capacity to buffer incoming AoE commands. By taking the current value of this field into accound, we increase performance throughput or avoid network congestion, when the value has increased or decreased, respectively. Signed-off-by:

Ed Cashin <ecashin@coraid.com> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

drivers/block/aoe/aoe.h

+3 −3

Original line number	Diff line number	Diff line
		@@ -122,14 +122,14 @@ struct aoeif {

		struct aoetgt {
		unsigned char addr[6];
		ushort nframes;
		ushort nframes; /* cap on frames to use */
		struct aoedev d; / parent device I belong to */
		struct list_head ffree; /* list of free frames */
		struct aoeif ifs[NAOEIFS];
		struct aoeif ifp; / current aoeif in use */
		ushort nout;
		ushort maxout;
		ulong falloc;
		ushort maxout; /* current value for max outstanding */
		ulong falloc; /* number of allocated frames */
		ulong lastwadj; /* last window adjustment */
		int minbcnt;
		int wpkts, rpkts;

drivers/block/aoe/aoecmd.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -1373,7 +1373,11 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
		spin_lock_irqsave(&d->lock, flags);

		t = gettgt(d, h->src);
		if (!t) {
		if (t) {
		t->nframes = n;
		if (n < t->maxout)
		t->maxout = n;
		} else {
		t = addtgt(d, h->src, n);
		if (!t)
		goto bail;

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