Messages in this thread Patch in this message | | | Date | Sat, 18 Sep 2010 11:57:36 -0700 | From | Greg KH <> | Subject | [012/123] staging: hv: Fixed bounce kmap problem by using correct index |
| |
From: Hank Janssen <hjanssen@microsoft.com>
commit 0c47a70a9a8a6d1ec37a53d2f9cb82f8b8ef8aa2 upstream.
Fixed bounce offset kmap problem by using correct index. The symptom of the problem is that in some NAS appliances this problem represents Itself by a unresponsive VM under a load with many clients writing small files.
Signed-off-by:Hank Janssen <hjanssen@microsoft.com> Signed-off-by:Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/staging/hv/storvsc_drv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -532,7 +532,7 @@ static unsigned int copy_to_bounce_buffe ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); - if (j == 0) + if (bounce_addr == 0) bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); while (srclen) { @@ -593,7 +593,7 @@ static unsigned int copy_from_bounce_buf destlen = orig_sgl[i].length; ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); - if (j == 0) + if (bounce_addr == 0) bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); while (destlen) {
| |