From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Simmons Date: Thu, 27 Feb 2020 16:14:36 -0500 Subject: [lustre-devel] [PATCH 408/622] lustre: llite: release active extent on sync write commit In-Reply-To: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> References: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> Message-ID: <1582838290-17243-409-git-send-email-jsimmons@infradead.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org From: Ann Koehler Processes can wait forever in osc_extent_wait() for the extent state to change because the extent write is not started before the wait begins. A 4.7 kernel change to generic_write_sync() modified it to check IOCB_DSYNC instead of O_SYNC. Thus an active extent is not released (written) in osc_io_commit_async() in the synchronous case. Cray-bug-id: LUS-7435 WC-bug-id: https://jira.whamcloud.com/browse/LU-12536 Lustre-commit: a9af7100ce72 ("LU-12536 llite: release active extent on sync write commit") Signed-off-by: Ann Koehler Reviewed-on: https://review.whamcloud.com/35472 Reviewed-by: Patrick Farrell Reviewed-by: Andreas Dilger Reviewed-by: Oleg Drokin Signed-off-by: James Simmons --- fs/lustre/llite/file.c | 9 +++++++-- fs/lustre/llite/llite_internal.h | 4 +++- fs/lustre/llite/rw.c | 2 +- 3 files changed, 11 insertions(+), 4 deletions(-) diff --git a/fs/lustre/llite/file.c b/fs/lustre/llite/file.c index 5a3e80e..6f418e0 100644 --- a/fs/lustre/llite/file.c +++ b/fs/lustre/llite/file.c @@ -1407,7 +1407,8 @@ static bool file_is_noatime(const struct file *file) return false; } -void ll_io_init(struct cl_io *io, const struct file *file, int write) +void ll_io_init(struct cl_io *io, const struct file *file, int write, + struct vvp_io_args *args) { struct ll_file_data *fd = LUSTRE_FPRIVATE(file); struct inode *inode = file_inode(file); @@ -1420,7 +1421,11 @@ void ll_io_init(struct cl_io *io, const struct file *file, int write) io->u.ci_wr.wr_sync = file->f_flags & O_SYNC || file->f_flags & O_DIRECT || IS_SYNC(inode); + io->u.ci_wr.wr_sync |= !!(args && + (args->u.normal.via_iocb->ki_flags & + IOCB_DSYNC)); } + io->ci_obj = ll_i2info(inode)->lli_clob; io->ci_lockreq = CILR_MAYBE; if (ll_file_nolock(file)) { @@ -1491,7 +1496,7 @@ static void ll_heat_add(struct inode *inode, enum cl_io_type iot, restart: io = vvp_env_thread_io(env); - ll_io_init(io, file, iot == CIT_WRITE); + ll_io_init(io, file, iot == CIT_WRITE, args); io->ci_ndelay_tried = retried; if (cl_io_rw_init(env, io, iot, *ppos, count) == 0) { diff --git a/fs/lustre/llite/llite_internal.h b/fs/lustre/llite/llite_internal.h index a0d631d..49c0c78 100644 --- a/fs/lustre/llite/llite_internal.h +++ b/fs/lustre/llite/llite_internal.h @@ -786,7 +786,6 @@ int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock, void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct ll_file_data *file, loff_t pos, size_t count, int rw); -void ll_io_init(struct cl_io *io, const struct file *file, int write); enum { LPROC_LL_READ_BYTES, @@ -1056,6 +1055,9 @@ static inline struct vvp_io_args *ll_env_args(const struct lu_env *env) return &ll_env_info(env)->lti_args; } +void ll_io_init(struct cl_io *io, const struct file *file, int write, + struct vvp_io_args *args); + /* llite/llite_mmap.c */ int ll_teardown_mmaps(struct address_space *mapping, u64 first, u64 last); diff --git a/fs/lustre/llite/rw.c b/fs/lustre/llite/rw.c index fe9a2b0..9c4b89f 100644 --- a/fs/lustre/llite/rw.c +++ b/fs/lustre/llite/rw.c @@ -503,7 +503,7 @@ static void ll_readahead_handle_work(struct work_struct *wq) } io = vvp_env_thread_io(env); - ll_io_init(io, file, 0); + ll_io_init(io, file, 0, NULL); rc = ll_readahead_file_kms(env, io, &kms); if (rc != 0) -- 1.8.3.1