1 files changed, 26 insertions, 10 deletions

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 5949372700ee..7895186cc765 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -555,6 +555,22 @@ static void f2fs_compress_free_page(struct page *page)
 	mempool_free(page, compress_page_pool);
 }
 
+#define MAX_VMAP_RETRIES	3
+
+static void *f2fs_vmap(struct page **pages, unsigned int count)
+{
+	int i;
+	void *buf = NULL;
+
+	for (i = 0; i < MAX_VMAP_RETRIES; i++) {
+		buf = vm_map_ram(pages, count, -1);
+		if (buf)
+			break;
+		vm_unmap_aliases();
+	}
+	return buf;
+}
+
 static int f2fs_compress_pages(struct compress_ctx *cc)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
@@ -591,13 +607,13 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
 		}
 	}
 
-	cc->rbuf = vmap(cc->rpages, cc->cluster_size, VM_MAP, PAGE_KERNEL_RO);
+	cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size);
 	if (!cc->rbuf) {
 		ret = -ENOMEM;
 		goto out_free_cpages;
 	}
 
-	cc->cbuf = vmap(cc->cpages, cc->nr_cpages, VM_MAP, PAGE_KERNEL);
+	cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages);
 	if (!cc->cbuf) {
 		ret = -ENOMEM;
 		goto out_vunmap_rbuf;
@@ -625,8 +641,8 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
 	memset(&cc->cbuf->cdata[cc->clen], 0,
 	       (nr_cpages * PAGE_SIZE) - (cc->clen + COMPRESS_HEADER_SIZE));
 
-	vunmap(cc->cbuf);
-	vunmap(cc->rbuf);
+	vm_unmap_ram(cc->cbuf, cc->nr_cpages);
+	vm_unmap_ram(cc->rbuf, cc->cluster_size);
 
 	for (i = nr_cpages; i < cc->nr_cpages; i++) {
 		f2fs_compress_free_page(cc->cpages[i]);
@@ -643,9 +659,9 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
 	return 0;
 
 out_vunmap_cbuf:
-	vunmap(cc->cbuf);
+	vm_unmap_ram(cc->cbuf, cc->nr_cpages);
 out_vunmap_rbuf:
-	vunmap(cc->rbuf);
+	vm_unmap_ram(cc->rbuf, cc->cluster_size);
 out_free_cpages:
 	for (i = 0; i < cc->nr_cpages; i++) {
 		if (cc->cpages[i])
@@ -716,13 +732,13 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
 			goto out_free_dic;
 	}
 
-	dic->rbuf = vmap(dic->tpages, dic->cluster_size, VM_MAP, PAGE_KERNEL);
+	dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size);
 	if (!dic->rbuf) {
 		ret = -ENOMEM;
 		goto destroy_decompress_ctx;
 	}
 
-	dic->cbuf = vmap(dic->cpages, dic->nr_cpages, VM_MAP, PAGE_KERNEL_RO);
+	dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages);
 	if (!dic->cbuf) {
 		ret = -ENOMEM;
 		goto out_vunmap_rbuf;
@@ -739,9 +755,9 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
 	ret = cops->decompress_pages(dic);
 
 out_vunmap_cbuf:
-	vunmap(dic->cbuf);
+	vm_unmap_ram(dic->cbuf, dic->nr_cpages);
 out_vunmap_rbuf:
-	vunmap(dic->rbuf);
+	vm_unmap_ram(dic->rbuf, dic->cluster_size);
 destroy_decompress_ctx:
 	if (cops->destroy_decompress_ctx)
 		cops->destroy_decompress_ctx(dic);