Possible unwrapped commit description (prefer a maximum 75 chars per line) Signed-off-by: hmsjwzb <weizhe...@gmail.com> --- fs/xfs/xfs_acl.c | 4 +-- fs/xfs/xfs_aops.c | 73 ++++++++++++++++++++++++----------------------- 2 files changed, 39 insertions(+), 38 deletions(-)
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index 8039e35147dd..5c779c161727 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -19,8 +19,8 @@ /* * Locking scheme: - * - all ACL updates are protected by inode->i_mutex, which is taken before - * calling into this file. + * - all ACL updates are protected by inode->i_mutex, + * which is taken before calling into this file. */ STATIC struct posix_acl * diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 338b9d9984e0..1a6cb88ffdb7 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -81,8 +81,8 @@ xfs_finish_page_writeback( /* * We're now finished for good with this ioend structure. Update the page - * state, release holds on bios, and finally free up memory. Do not use the - * ioend after this. + * state, release holds on bios, and finally free up memory. + * Do not use the ioend after this. */ STATIC void xfs_destroy_ioend( @@ -464,18 +464,18 @@ xfs_map_blocks( } /* - * Submit the bio for an ioend. We are passed an ioend with a bio attached to - * it, and we submit that bio. The ioend may be used for multiple bio - * submissions, so we only want to allocate an append transaction for the ioend - * once. In the case of multiple bio submission, each bio will take an IO - * reference to the ioend to ensure that the ioend completion is only done once - * all bios have been submitted and the ioend is really done. + * Submit the bio for an ioend. We are passed an ioend with a bio attached + * to it, and we submit that bio. The ioend may be used for multiple bio + * submissions, so we only want to allocate an append transaction for the + * ioend once. In the case of multiple bio submission, each bio will take + * an IO reference to the ioend to ensure that the ioend completion is only + * done once all bios have been submitted and the ioend is really done. * - * If @fail is non-zero, it means that we have a situation where some part of - * the submission process has failed after we have marked paged for writeback - * and unlocked them. In this situation, we need to fail the bio and ioend - * rather than submit it to IO. This typically only happens on a filesystem - * shutdown. + * If @fail is non-zero, it means that we have a situation where some part + * of the submission process has failed after we have marked paged for + * writeback and unlocked them. In this situation, we need to fail the bio + * and ioend rather than submit it to IO. This typically only happens + * on a filesystem shutdown. */ STATIC int xfs_submit_ioend( @@ -583,8 +583,8 @@ xfs_chain_bio( } /* - * Test to see if we have an existing ioend structure that we could append to - * first, otherwise finish off the current ioend and start another. + * Test to see if we have an existing ioend structure that we could append + * to first, otherwise finish off the current ioend and start another. */ STATIC void xfs_add_to_ioend( @@ -637,15 +637,16 @@ xfs_vm_invalidatepage( } /* - * If the page has delalloc blocks on it, we need to punch them out before we - * invalidate the page. If we don't, we leave a stale delalloc mapping on the - * inode that can trip up a later direct I/O read operation on the same region. + * If the page has delalloc blocks on it, we need to punch them out before + * we invalidate the page. If we don't, we leave a stale delalloc mapping + * on the inode that can trip up a later direct I/O read operation on + * the same region. * - * We prevent this by truncating away the delalloc regions on the page. Because - * they are delalloc, we can do this without needing a transaction. Indeed - if - * we get ENOSPC errors, we have to be able to do this truncation without a - * transaction as there is no space left for block reservation (typically why we - * see a ENOSPC in writeback). + * We prevent this by truncating away the delalloc regions on the page. + * Because they are delalloc, we can do this without needing a transaction. + * Indeed - if we get ENOSPC errors, we have to be able to do this + * truncation without a transaction as there is no space left for block + * reservation (typically why we see a ENOSPC in writeback). */ STATIC void xfs_aops_discard_page( @@ -674,20 +675,20 @@ xfs_aops_discard_page( } /* - * We implement an immediate ioend submission policy here to avoid needing to - * chain multiple ioends and hence nest mempool allocations which can violate - * forward progress guarantees we need to provide. The current ioend we are - * adding blocks to is cached on the writepage context, and if the new block - * does not append to the cached ioend it will create a new ioend and cache that - * instead. + * We implement an immediate ioend submission policy here to avoid needing + * to chain multiple ioends and hence nest mempool allocations which can + * violate forward progress guarantees we need to provide. The current + * ioend we are adding blocks to is cached on the writepage context, + * and if the new block does not append to the cached ioend it will create + * a new ioend and cache that instead. * - * If a new ioend is created and cached, the old ioend is returned and queued - * locally for submission once the entire page is processed or an error has been - * detected. While ioends are submitted immediately after they are completed, - * batching optimisations are provided by higher level block plugging. - * - * At the end of a writeback pass, there will be a cached ioend remaining on the - * writepage context that the caller will need to submit. + * If a new ioend is created and cached, the old ioend is returned and + * queued locally for submission once the entire page is processed or an + * error has been detected. While ioends are submitted immediately + * after they are completed, batching optimisations are provided by higher + * level block plugging. + * At the end of a writeback pass, there will be a cached ioend remaining + * on the writepage context that the caller will need to submit. */ static int xfs_writepage_map( -- 2.17.1
