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Date: Mon, 10 Oct 2011 11:28:13 -0400 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org, hch@...radead.org, Jan Beulich <JBeulich@...ell.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Li Dongyang <lidongyang@...ell.com> Subject: [PATCH 2/3] xen/blkback: Fix the inhibition to map pages when discarding sector ranges. The 'operation' parameters are the ones provided to the bio layer while the req->operation are the ones passed in between the backend and frontend. We used the wrong 'operation' value to squash the call to map pages when processing the discard operation resulting in mapping the pages unnecessarily. CC: Li Dongyang <lidongyang@...ell.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> --- drivers/block/xen-blkback/blkback.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 184b133..3da9a40 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -707,7 +707,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, * the hypercall to unmap the grants - that is all done in * xen_blkbk_unmap. */ - if (operation != BLKIF_OP_DISCARD && + if (operation != REQ_DISCARD && xen_blkbk_map(req, pending_req, seg)) goto fail_flush; -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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