search for: lock_fd

..., _, _) -> + eprintf "%s: %s\n" msg (Unix.error_message err) + | exn -> + eprintf "%s: %s\n" msg (Printexc.to_string exn) + (* Main program. *) let () = check_functions (); - if not (Sys.file_exists "HACKING") then ( - eprintf "\ + let lock_fd = + try Unix.openfile "HACKING" [Unix.O_RDWR] 0 + with + | Unix.Unix_error (Unix.ENOENT, _, _) -> + eprintf "\ You are probably running this from the wrong directory. Run it from the top source directory using the command src/generator.ml "; - exit 1 - ); +...

...sername, + "/"DSYNC_LOCK_FILENAME); + } else { + brain->lock_path = p_strconcat(brain->pool, home, + "/"DSYNC_LOCK_FILENAME, NULL); + } brain->lock_fd = file_create_locked(brain->lock_path, &lock_set, &brain->lock, &created, &error); if (brain->lock_fd == -1) -------------- next part --------------

...lish ( I managed to once :) . Yet, it''s ineffective. We can complicate it, assuring practically 100% success ratio. Section V. Scenario 3. Let''s try to force a context switch immediately after spawn.c calls exec. spawn.c should open a file (called .lock ) receiving descriptor lock_fd and set a close-on-exec flag on it. Then spawn.c executes flock(lock_fd,LOCK_EX). Another program ( called noloop ) opens .lock and performs flock(noloop_fd,LOCK_EX) as well ( and goes to sleep). We also spawn a program called eat_time, which simply does for(;;);, generating some load on the machin...

Should be fixed by https://github.com/dovecot/core/commit/a952e178943a5944255cb7c053d970f8e6d49336 <https://github.com/dovecot/core/commit/a952e178943a5944255cb7c053d970f8e6d49336> -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20180606/996cfe38/attachment.html>

using latest auto build didn't help. this happens only with a specific account. # doveadm -o imapc_user=----- at domain.com -o imapc_password=---- backup -u =----- at domain.com -R imapc: dsync(---- at domain.com): Panic: pool_data_stack_realloc(): stack frame changed dsync(---- at domain.com): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x4209a) [0xb762b09a] ->

By splitting up large C files we can make parallel compiles a bit faster. Rich.