Author: chuck Date: Fri Jun 15 15:22:27 2018 New Revision: 335205 URL: https://svnweb.freebsd.org/changeset/base/335205
Log: Add linprocfs support for min_free_kbytes This adds linprocfs support for proc/sys/vm/min_free_kbytes which the free program requires for correct operation. The approach mirrors the approach used in illumos. Reviewed by: imp (mentor), emaste Approved by: imp (mentor) Differential Revision: https://reviews.freebsd.org/D15563 Modified: head/sys/compat/linprocfs/linprocfs.c Modified: head/sys/compat/linprocfs/linprocfs.c ============================================================================== --- head/sys/compat/linprocfs/linprocfs.c Fri Jun 15 15:10:21 2018 (r335204) +++ head/sys/compat/linprocfs/linprocfs.c Fri Jun 15 15:22:27 2018 (r335205) @@ -1303,6 +1303,21 @@ linprocfs_dosem(PFS_FILL_ARGS) } /* + * Filler function for proc/sys/vm/min_free_kbytes + * + * This mirrors the approach in illumos to return zero for reads. Effectively, + * it says, no memory is kept in reserve for "atomic allocations". This class + * of allocation can be used at times when a thread cannot be suspended. + */ +static int +linprocfs_dominfree(PFS_FILL_ARGS) +{ + + sbuf_printf(sb, "%d\n", 0); + return (0); +} + +/* * Filler function for proc/scsi/device_info */ static int @@ -1562,6 +1577,7 @@ linprocfs_init(PFS_INIT_ARGS) { struct pfs_node *root; struct pfs_node *dir; + struct pfs_node *sys; root = pi->pi_root; @@ -1643,9 +1659,9 @@ linprocfs_init(PFS_INIT_ARGS) NULL, NULL, NULL, PFS_RD); /* /proc/sys/... */ - dir = pfs_create_dir(root, "sys", NULL, NULL, NULL, 0); + sys = pfs_create_dir(root, "sys", NULL, NULL, NULL, 0); /* /proc/sys/kernel/... */ - dir = pfs_create_dir(dir, "kernel", NULL, NULL, NULL, 0); + dir = pfs_create_dir(sys, "kernel", NULL, NULL, NULL, 0); pfs_create_file(dir, "osrelease", &linprocfs_doosrelease, NULL, NULL, NULL, PFS_RD); pfs_create_file(dir, "ostype", &linprocfs_doostype, @@ -1662,6 +1678,11 @@ linprocfs_init(PFS_INIT_ARGS) /* /proc/sys/kernel/random/... */ dir = pfs_create_dir(dir, "random", NULL, NULL, NULL, 0); pfs_create_file(dir, "uuid", &linprocfs_douuid, + NULL, NULL, NULL, PFS_RD); + + /* /proc/sys/vm/.... */ + dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0); + pfs_create_file(dir, "min_free_kbytes", &linprocfs_dominfree, NULL, NULL, NULL, PFS_RD); return (0); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
