That is: set NOATIME, NOCOW, and NOCOMP for the journal directory --- src/journal/journald-server.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-)
diff --git src/journal/journald-server.c src/journal/journald-server.c index eda5dcf..37d6dc3 100644 --- src/journal/journald-server.c +++ src/journal/journald-server.c @@ -21,6 +21,7 @@ #include <sys/signalfd.h> #include <sys/ioctl.h> +#include <linux/fs.h> #include <linux/sockios.h> #include <sys/statvfs.h> #include <sys/mman.h> @@ -920,7 +921,7 @@ finish: static int system_journal_open(Server *s) { - int r; + int r, fd; char *fn; sd_id128_t machine; char ids[33]; @@ -947,7 +948,31 @@ static int system_journal_open(Server *s) { (void) mkdir("/var/log/journal/", 0755); fn = strappenda("/var/log/journal/", ids); - (void) mkdir(fn, 0755); + (void)mkdir(fn, 0755); + + /* + * On journaling and/or compressing file systems avoid doubling the + * efforts for the system, that is set NOCOW and NOCOMP inode flags. + * Check for every single flag as otherwise some of the file systems + * may return EOPNOTSUPP on one unkown flag (like BtrFS does). + */ + if ((fd = open(fn, O_DIRECTORY)) >= 0) { + long flags; + if (ioctl(fd, FS_IOC_GETFLAGS, &flags) == 0) { + int old = flags; + if (!(flags&FS_NOATIME_FL) && ioctl(fd, FS_IOC_SETFLAGS, flags|FS_NOATIME_FL) == 0) + flags |= FS_NOATIME_FL; + if (!(flags&FS_NOCOW_FL) && ioctl(fd, FS_IOC_SETFLAGS, flags|FS_NOCOW_FL) == 0) + flags |= FS_NOCOW_FL; + if (!(flags&FS_NOCOMP_FL) && s->compress) { + flags &= ~FS_COMPR_FL; + flags |= FS_NOCOMP_FL; + } + if (old != flags) + ioctl(fd, FS_IOC_SETFLAGS, flags); + } + close(fd); + } fn = strappenda(fn, "/system.journal"); r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal); -- 1.7.9.2 _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel