diff options
| author | Li Zhe <lizhe.67@bytedance.com> | 2025-08-14 14:47:12 +0800 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2025-10-06 11:21:26 -0600 |
| commit | d10872050ffeda8c3bdc08f3376bb49b34b4e643 (patch) | |
| tree | dd91c190895b72d7b17e1bd8aef4849bfb847686 | |
| parent | f6c84a52cc41e2aaed0d956d0a1c1802513a239c (diff) | |
vfio/type1: batch vfio_find_vpfn() in function vfio_unpin_pages_remote()
The function vpfn_pages() can help us determine the number of vpfn
nodes on the vpfn rb tree within a specified range. This allows us
to avoid searching for each vpfn individually in the function
vfio_unpin_pages_remote(). This patch batches the vfio_find_vpfn()
calls in function vfio_unpin_pages_remote().
Signed-off-by: Li Zhe <lizhe.67@bytedance.com>
Link: https://lore.kernel.org/r/20250814064714.56485-4-lizhe.67@bytedance.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 7829b5e268c2..dbacd852efae 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -802,16 +802,12 @@ static long vfio_unpin_pages_remote(struct vfio_dma *dma, dma_addr_t iova, unsigned long pfn, unsigned long npage, bool do_accounting) { - long unlocked = 0, locked = 0; + long unlocked = 0, locked = vpfn_pages(dma, iova, npage); long i; - for (i = 0; i < npage; i++, iova += PAGE_SIZE) { - if (put_pfn(pfn++, dma->prot)) { + for (i = 0; i < npage; i++) + if (put_pfn(pfn++, dma->prot)) unlocked++; - if (vfio_find_vpfn(dma, iova)) - locked++; - } - } if (do_accounting) vfio_lock_acct(dma, locked - unlocked, true); |