[PATCH 1/5] staging: hv: Fixed bounce kmap problem by using correct index
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From: Hank Janssen on 5 Aug 2010 15:30 From: Hank Janssen <hjanssen(a)microsoft.com> 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(a)microsoft.com> Signed-off-by:Haiyang Zhang <haiyangz(a)microsoft.com> Cc: stable <stable(a)kernel.org> --- drivers/staging/hv/storvsc_drv.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c index 075b61b..3b9ccb0 100644 --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -495,7 +495,7 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, /* 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) { @@ -556,7 +556,7 @@ static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, 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) { -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |