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[Qemu-devel] [PATCH] qemu/xendisk: set maximum number of grants to be us
From: |
Jan Beulich |
Subject: |
[Qemu-devel] [PATCH] qemu/xendisk: set maximum number of grants to be used |
Date: |
Fri, 11 May 2012 08:19:16 +0100 |
Legacy (non-pvops) gntdev drivers may require this to be done when the
number of grants intended to be used simultaneously exceeds a certain
driver specific default limit.
Signed-off-by: Jan Beulich <address@hidden>
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -536,6 +536,10 @@ static void blk_alloc(struct XenDevice *
if (xen_mode != XEN_EMULATE) {
batch_maps = 1;
}
+ if (xc_gnttab_set_max_grants(xendev->gnttabdev,
+ max_requests * BLKIF_MAX_SEGMENTS_PER_REQUEST + 1) < 0)
+ xen_be_printf(xendev, 0, "xc_gnttab_set_max_grants failed: %s\n",
+ strerror(errno));
}
static int blk_init(struct XenDevice *xendev)
qemu-xendisk-set-max-grants.patch
Description: Text document
- [Qemu-devel] [PATCH] qemu/xendisk: set maximum number of grants to be used,
Jan Beulich <=