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net: introduce page_frag_cache_drain()

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When draining a page_frag_cache, most user are doing
the similar steps, so introduce an API to avoid code
duplication.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Yunsheng Lin 2024-02-28 17:30:10 +08:00 committed by Paolo Abeni
parent 4bc0d63a23
commit a0727489ac
6 changed files with 17 additions and 33 deletions
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11
drivers/net/ethernet/google/gve/gve_main.c
View File

@ -1276,17 +1276,10 @@ static void gve_unreg_xdp_info(struct gve_priv *priv)
static void gve_drain_page_cache(struct gve_priv *priv)
{
struct page_frag_cache *nc;
int i;
for (i = 0; i < priv->rx_cfg.num_queues; i++) {
nc = &priv->rx[i].page_cache;
if (nc->va) {
__page_frag_cache_drain(virt_to_page(nc->va),
nc->pagecnt_bias);
nc->va = NULL;
}
}
for (i = 0; i < priv->rx_cfg.num_queues; i++)
page_frag_cache_drain(&priv->rx[i].page_cache);
}
static void gve_qpls_get_curr_alloc_cfg(struct gve_priv *priv,

17
drivers/net/ethernet/mediatek/mtk_wed_wo.c
View File

@ -286,7 +286,6 @@ mtk_wed_wo_queue_free(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q)
static void
mtk_wed_wo_queue_tx_clean(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q)
{
struct page *page;
int i;
for (i = 0; i < q->n_desc; i++) {
@ -301,19 +300,12 @@ mtk_wed_wo_queue_tx_clean(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q)
entry->buf = NULL;
}
if (!q->cache.va)
return;
page = virt_to_page(q->cache.va);
__page_frag_cache_drain(page, q->cache.pagecnt_bias);
memset(&q->cache, 0, sizeof(q->cache));
page_frag_cache_drain(&q->cache);
}
static void
mtk_wed_wo_queue_rx_clean(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q)
{
struct page *page;
for (;;) {
void *buf = mtk_wed_wo_dequeue(wo, q, NULL, true);
@ -323,12 +315,7 @@ mtk_wed_wo_queue_rx_clean(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q)
skb_free_frag(buf);
}
if (!q->cache.va)
return;
page = virt_to_page(q->cache.va);
__page_frag_cache_drain(page, q->cache.pagecnt_bias);
memset(&q->cache, 0, sizeof(q->cache));
page_frag_cache_drain(&q->cache);
}
static void

7
drivers/nvme/host/tcp.c
View File

@ -1344,7 +1344,6 @@ static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl)
static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
{
struct page *page;
struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl);
struct nvme_tcp_queue *queue = &ctrl->queues[qid];
unsigned int noreclaim_flag;
@ -1355,11 +1354,7 @@ static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
if (queue->hdr_digest || queue->data_digest)
nvme_tcp_free_crypto(queue);
if (queue->pf_cache.va) {
page = virt_to_head_page(queue->pf_cache.va);
__page_frag_cache_drain(page, queue->pf_cache.pagecnt_bias);
queue->pf_cache.va = NULL;
}
page_frag_cache_drain(&queue->pf_cache);
noreclaim_flag = memalloc_noreclaim_save();
/* ->sock will be released by fput() */

4
drivers/nvme/target/tcp.c
View File

@ -1591,7 +1591,6 @@ static void nvmet_tcp_free_cmd_data_in_buffers(struct nvmet_tcp_queue *queue)
static void nvmet_tcp_release_queue_work(struct work_struct *w)
{
struct page *page;
struct nvmet_tcp_queue *queue =
container_of(w, struct nvmet_tcp_queue, release_work);
@ -1615,8 +1614,7 @@ static void nvmet_tcp_release_queue_work(struct work_struct *w)
if (queue->hdr_digest || queue->data_digest)
nvmet_tcp_free_crypto(queue);
ida_free(&nvmet_tcp_queue_ida, queue->idx);
page = virt_to_head_page(queue->pf_cache.va);
__page_frag_cache_drain(page, queue->pf_cache.pagecnt_bias);
page_frag_cache_drain(&queue->pf_cache);
kfree(queue);
}

1
include/linux/gfp.h
View File

@ -311,6 +311,7 @@ extern void __free_pages(struct page *page, unsigned int order);
extern void free_pages(unsigned long addr, unsigned int order);
struct page_frag_cache;
void page_frag_cache_drain(struct page_frag_cache *nc);
extern void __page_frag_cache_drain(struct page *page, unsigned int count);
void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz,
gfp_t gfp_mask, unsigned int align_mask);

10
mm/page_alloc.c
View File

@ -4699,6 +4699,16 @@ static struct page *__page_frag_cache_refill(struct page_frag_cache *nc,
return page;
}
void page_frag_cache_drain(struct page_frag_cache *nc)
{
if (!nc->va)
return;
__page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias);
nc->va = NULL;
}
EXPORT_SYMBOL(page_frag_cache_drain);
void __page_frag_cache_drain(struct page *page, unsigned int count)
{
VM_BUG_ON_PAGE(page_ref_count(page) == 0, page);