page_io.c (e5451c8f8330e03ad3cfa16048b4daf961af434f) page_io.c (1170532bb49f9468aedabdc1d5a560e2521a2bcc)
1/*
2 * linux/mm/page_io.c
3 *
4 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
5 *
6 * Swap reorganised 29.12.95,
7 * Asynchronous swapping added 30.12.95. Stephen Tweedie
8 * Removed race in async swapping. 14.4.1996. Bruno Haible

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51 * We failed to write the page out to swap-space.
52 * Re-dirty the page in order to avoid it being reclaimed.
53 * Also print a dire warning that things will go BAD (tm)
54 * very quickly.
55 *
56 * Also clear PG_reclaim to avoid rotate_reclaimable_page()
57 */
58 set_page_dirty(page);
1/*
2 * linux/mm/page_io.c
3 *
4 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
5 *
6 * Swap reorganised 29.12.95,
7 * Asynchronous swapping added 30.12.95. Stephen Tweedie
8 * Removed race in async swapping. 14.4.1996. Bruno Haible

--- 42 unchanged lines hidden (view full) ---

51 * We failed to write the page out to swap-space.
52 * Re-dirty the page in order to avoid it being reclaimed.
53 * Also print a dire warning that things will go BAD (tm)
54 * very quickly.
55 *
56 * Also clear PG_reclaim to avoid rotate_reclaimable_page()
57 */
58 set_page_dirty(page);
59 printk(KERN_ALERT "Write-error on swap-device (%u:%u:%Lu)\n",
60 imajor(bio->bi_bdev->bd_inode),
61 iminor(bio->bi_bdev->bd_inode),
62 (unsigned long long)bio->bi_iter.bi_sector);
59 pr_alert("Write-error on swap-device (%u:%u:%llu)\n",
60 imajor(bio->bi_bdev->bd_inode),
61 iminor(bio->bi_bdev->bd_inode),
62 (unsigned long long)bio->bi_iter.bi_sector);
63 ClearPageReclaim(page);
64 }
65 end_page_writeback(page);
66 bio_put(bio);
67}
68
69static void end_swap_bio_read(struct bio *bio)
70{
71 struct page *page = bio->bi_io_vec[0].bv_page;
72
73 if (bio->bi_error) {
74 SetPageError(page);
75 ClearPageUptodate(page);
63 ClearPageReclaim(page);
64 }
65 end_page_writeback(page);
66 bio_put(bio);
67}
68
69static void end_swap_bio_read(struct bio *bio)
70{
71 struct page *page = bio->bi_io_vec[0].bv_page;
72
73 if (bio->bi_error) {
74 SetPageError(page);
75 ClearPageUptodate(page);
76 printk(KERN_ALERT "Read-error on swap-device (%u:%u:%Lu)\n",
77 imajor(bio->bi_bdev->bd_inode),
78 iminor(bio->bi_bdev->bd_inode),
79 (unsigned long long)bio->bi_iter.bi_sector);
76 pr_alert("Read-error on swap-device (%u:%u:%llu)\n",
77 imajor(bio->bi_bdev->bd_inode),
78 iminor(bio->bi_bdev->bd_inode),
79 (unsigned long long)bio->bi_iter.bi_sector);
80 goto out;
81 }
82
83 SetPageUptodate(page);
84
85 /*
86 * There is no guarantee that the page is in swap cache - the software
87 * suspend code (at least) uses end_swap_bio_read() against a non-

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211 if (page_no == 0)
212 page_no = 1; /* force Empty message */
213 sis->max = page_no;
214 sis->pages = page_no - 1;
215 sis->highest_bit = page_no - 1;
216out:
217 return ret;
218bad_bmap:
80 goto out;
81 }
82
83 SetPageUptodate(page);
84
85 /*
86 * There is no guarantee that the page is in swap cache - the software
87 * suspend code (at least) uses end_swap_bio_read() against a non-

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211 if (page_no == 0)
212 page_no = 1; /* force Empty message */
213 sis->max = page_no;
214 sis->pages = page_no - 1;
215 sis->highest_bit = page_no - 1;
216out:
217 return ret;
218bad_bmap:
219 printk(KERN_ERR "swapon: swapfile has holes\n");
219 pr_err("swapon: swapfile has holes\n");
220 ret = -EINVAL;
221 goto out;
222}
223
224/*
225 * We may have stale swap cache pages in memory: notice
226 * them here and get rid of the unnecessary final write.
227 */

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285 * Mark the page dirty and avoid
286 * rotate_reclaimable_page but rate-limit the
287 * messages but do not flag PageError like
288 * the normal direct-to-bio case as it could
289 * be temporary.
290 */
291 set_page_dirty(page);
292 ClearPageReclaim(page);
220 ret = -EINVAL;
221 goto out;
222}
223
224/*
225 * We may have stale swap cache pages in memory: notice
226 * them here and get rid of the unnecessary final write.
227 */

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285 * Mark the page dirty and avoid
286 * rotate_reclaimable_page but rate-limit the
287 * messages but do not flag PageError like
288 * the normal direct-to-bio case as it could
289 * be temporary.
290 */
291 set_page_dirty(page);
292 ClearPageReclaim(page);
293 pr_err_ratelimited("Write error on dio swapfile (%Lu)\n",
294 page_file_offset(page));
293 pr_err_ratelimited("Write error on dio swapfile (%llu)\n",
294 page_file_offset(page));
295 }
296 end_page_writeback(page);
297 return ret;
298 }
299
300 ret = bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc);
301 if (!ret) {
302 count_vm_event(PSWPOUT);

--- 75 unchanged lines hidden --- 		295 }
296 end_page_writeback(page);
297 return ret;
298 }
299
300 ret = bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc);
301 if (!ret) {
302 count_vm_event(PSWPOUT);

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