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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-11-25 18:55:44 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-11-25 18:55:44 -0800 |
commit | 277f850fbc4a0c732311af2b9a2d28d29a3c5582 (patch) | |
tree | 49edadbb3dc04d62117b7ceeb6018e5ac8df0596 | |
parent | d1ca00078071cb6c45f15ab589682182cb5e628e (diff) | |
parent | 835f252c6debd204fcd607c79975089b1ecd3472 (diff) | |
download | linux-stable-277f850fbc4a0c732311af2b9a2d28d29a3c5582.tar.gz linux-stable-277f850fbc4a0c732311af2b9a2d28d29a3c5582.tar.bz2 linux-stable-277f850fbc4a0c732311af2b9a2d28d29a3c5582.zip |
Merge git://git.kvack.org/~bcrl/aio-fixes
Pull aio fix from Ben LaHaise:
"Dirty page accounting fix for aio"
* git://git.kvack.org/~bcrl/aio-fixes:
aio: fix uncorrent dirty pages accouting when truncating AIO ring buffer
-rw-r--r-- | fs/aio.c | 21 |
1 files changed, 14 insertions, 7 deletions
@@ -165,6 +165,15 @@ static struct vfsmount *aio_mnt; static const struct file_operations aio_ring_fops; static const struct address_space_operations aio_ctx_aops; +/* Backing dev info for aio fs. + * -no dirty page accounting or writeback happens + */ +static struct backing_dev_info aio_fs_backing_dev_info = { + .name = "aiofs", + .state = 0, + .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK | BDI_CAP_MAP_COPY, +}; + static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages) { struct qstr this = QSTR_INIT("[aio]", 5); @@ -176,6 +185,7 @@ static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages) inode->i_mapping->a_ops = &aio_ctx_aops; inode->i_mapping->private_data = ctx; + inode->i_mapping->backing_dev_info = &aio_fs_backing_dev_info; inode->i_size = PAGE_SIZE * nr_pages; path.dentry = d_alloc_pseudo(aio_mnt->mnt_sb, &this); @@ -220,6 +230,9 @@ static int __init aio_setup(void) if (IS_ERR(aio_mnt)) panic("Failed to create aio fs mount."); + if (bdi_init(&aio_fs_backing_dev_info)) + panic("Failed to init aio fs backing dev info."); + kiocb_cachep = KMEM_CACHE(kiocb, SLAB_HWCACHE_ALIGN|SLAB_PANIC); kioctx_cachep = KMEM_CACHE(kioctx,SLAB_HWCACHE_ALIGN|SLAB_PANIC); @@ -281,11 +294,6 @@ static const struct file_operations aio_ring_fops = { .mmap = aio_ring_mmap, }; -static int aio_set_page_dirty(struct page *page) -{ - return 0; -} - #if IS_ENABLED(CONFIG_MIGRATION) static int aio_migratepage(struct address_space *mapping, struct page *new, struct page *old, enum migrate_mode mode) @@ -357,7 +365,7 @@ out: #endif static const struct address_space_operations aio_ctx_aops = { - .set_page_dirty = aio_set_page_dirty, + .set_page_dirty = __set_page_dirty_no_writeback, #if IS_ENABLED(CONFIG_MIGRATION) .migratepage = aio_migratepage, #endif @@ -412,7 +420,6 @@ static int aio_setup_ring(struct kioctx *ctx) pr_debug("pid(%d) page[%d]->count=%d\n", current->pid, i, page_count(page)); SetPageUptodate(page); - SetPageDirty(page); unlock_page(page); ctx->ring_pages[i] = page; |