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gve: Fix GFP flags when allocing pages
Use GFP_ATOMIC when allocating pages out of the hotpath,
continue to use GFP_KERNEL when allocating pages during setup.
GFP_KERNEL will allow blocking which allows it to succeed
more often in a low memory enviornment but in the hotpath we do
not want to allow the allocation to block.
Fixes: f5cedc84a3
("gve: Add transmit and receive support")
Signed-off-by: Catherine Sullivan <csully@google.com>
Signed-off-by: David Awogbemila <awogbemila@google.com>
Link: https://lore.kernel.org/r/20220126003843.3584521-1-awogbemila@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
parent
2f65132843
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@ -843,7 +843,7 @@ static inline bool gve_is_gqi(struct gve_priv *priv)
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/* buffers */
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int gve_alloc_page(struct gve_priv *priv, struct device *dev,
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struct page **page, dma_addr_t *dma,
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enum dma_data_direction);
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enum dma_data_direction, gfp_t gfp_flags);
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void gve_free_page(struct device *dev, struct page *page, dma_addr_t dma,
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enum dma_data_direction);
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/* tx handling */
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@ -766,9 +766,9 @@ static void gve_free_rings(struct gve_priv *priv)
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int gve_alloc_page(struct gve_priv *priv, struct device *dev,
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struct page **page, dma_addr_t *dma,
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enum dma_data_direction dir)
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enum dma_data_direction dir, gfp_t gfp_flags)
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{
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*page = alloc_page(GFP_KERNEL);
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*page = alloc_page(gfp_flags);
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if (!*page) {
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priv->page_alloc_fail++;
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return -ENOMEM;
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@ -811,7 +811,7 @@ static int gve_alloc_queue_page_list(struct gve_priv *priv, u32 id,
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for (i = 0; i < pages; i++) {
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err = gve_alloc_page(priv, &priv->pdev->dev, &qpl->pages[i],
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&qpl->page_buses[i],
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gve_qpl_dma_dir(priv, id));
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gve_qpl_dma_dir(priv, id), GFP_KERNEL);
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/* caller handles clean up */
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if (err)
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return -ENOMEM;
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@ -86,7 +86,8 @@ static int gve_rx_alloc_buffer(struct gve_priv *priv, struct device *dev,
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dma_addr_t dma;
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int err;
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err = gve_alloc_page(priv, dev, &page, &dma, DMA_FROM_DEVICE);
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err = gve_alloc_page(priv, dev, &page, &dma, DMA_FROM_DEVICE,
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GFP_ATOMIC);
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if (err)
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return err;
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@ -157,7 +157,7 @@ static int gve_alloc_page_dqo(struct gve_priv *priv,
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int err;
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err = gve_alloc_page(priv, &priv->pdev->dev, &buf_state->page_info.page,
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&buf_state->addr, DMA_FROM_DEVICE);
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&buf_state->addr, DMA_FROM_DEVICE, GFP_KERNEL);
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if (err)
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return err;
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