On Sun, Nov 29, 2020 at 02:03:57PM +0100, Michal Meloun wrote: > On 28.11.2020 13:12, Konstantin Belousov wrote: > > Author: kib > > Date: Sat Nov 28 12:12:51 2020 > > New Revision: 368124 > > URL: https://svnweb.freebsd.org/changeset/base/368124 > > > > Log: > > Make MAXPHYS tunable. Bump MAXPHYS to 1M. > > > Unfortunately, bumping MAXPHYS broke arm kernel. The kernel runs out of KVA > while running 'pbuf' keg init function. This causes that keg_alloc_slab() > always returns NULL and for cycle in uma_prealloc() newer ends (whish should > be considered as another bug). > Do you think that MAXPHYS constant can depends on given arch? > 128k (or 256k) sounds reasonable for arm32 systems...
I think it is reasonable to return to 128KB for 32bit systems. diff --git a/sys/sys/param.h b/sys/sys/param.h index 00fb0c860e7..076b1fcde05 100644 --- a/sys/sys/param.h +++ b/sys/sys/param.h @@ -159,8 +159,12 @@ #ifndef DFLTPHYS #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ #endif -#ifndef MAXPHYS -#define MAXPHYS (1024 * 1024) /* max raw I/O transfer size */ +#ifndef MAXPHYS /* max raw I/O transfer size */ +#ifdef __ILP32__ +#define MAXPHYS (128 * 1024) +#else +#define MAXPHYS (1024 * 1024) +#endif #endif #ifndef MAXDUMPPGS #define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) _______________________________________________ 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"
