Author: rmacklem Date: Sat Apr 25 00:52:01 2015 New Revision: 281960 URL: https://svnweb.freebsd.org/changeset/base/281960
Log: MAXBSIZE defines both the largest UFS block size and the largest size for a buffer in the buffer cache. This patch defines a new constant MAXBCACHEBUF, which is the largest size for a buffer in the buffer cache. Having a separate constant allows MAXBCACHEBUF to be set larger than MAXBSIZE on a per-architecture basis, so that NFS can do larger read/writes for these architectures. It modifies sys/param.h so that BKVASIZE can also be set on a per-architecture basis. A couple of cases where NFS used MAXBSIZE instead of NFS_MAXBSIZE is fixed as well. Differential Revision: https://reviews.freebsd.org/D2330 Reviewed by: mav, kib MFC after: 2 weeks Modified: head/sys/fs/nfs/nfsport.h head/sys/fs/nfsclient/nfs_clvfsops.c head/sys/kern/vfs_bio.c head/sys/sys/param.h Modified: head/sys/fs/nfs/nfsport.h ============================================================================== --- head/sys/fs/nfs/nfsport.h Sat Apr 25 00:51:44 2015 (r281959) +++ head/sys/fs/nfs/nfsport.h Sat Apr 25 00:52:01 2015 (r281960) @@ -950,7 +950,7 @@ struct nfsreq { }; #ifndef NFS_MAXBSIZE -#define NFS_MAXBSIZE MAXBSIZE +#define NFS_MAXBSIZE MAXBCACHEBUF #endif /* Modified: head/sys/fs/nfsclient/nfs_clvfsops.c ============================================================================== --- head/sys/fs/nfsclient/nfs_clvfsops.c Sat Apr 25 00:51:44 2015 (r281959) +++ head/sys/fs/nfsclient/nfs_clvfsops.c Sat Apr 25 00:52:01 2015 (r281960) @@ -201,16 +201,16 @@ newnfs_iosize(struct nfsmount *nmp) } if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0) nmp->nm_rsize = maxio; - if (nmp->nm_rsize > MAXBSIZE) - nmp->nm_rsize = MAXBSIZE; + if (nmp->nm_rsize > NFS_MAXBSIZE) + nmp->nm_rsize = NFS_MAXBSIZE; if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0) nmp->nm_readdirsize = maxio; if (nmp->nm_readdirsize > nmp->nm_rsize) nmp->nm_readdirsize = nmp->nm_rsize; if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0) nmp->nm_wsize = maxio; - if (nmp->nm_wsize > MAXBSIZE) - nmp->nm_wsize = MAXBSIZE; + if (nmp->nm_wsize > NFS_MAXBSIZE) + nmp->nm_wsize = NFS_MAXBSIZE; /* * Calculate the size used for io buffers. Use the larger Modified: head/sys/kern/vfs_bio.c ============================================================================== --- head/sys/kern/vfs_bio.c Sat Apr 25 00:51:44 2015 (r281959) +++ head/sys/kern/vfs_bio.c Sat Apr 25 00:52:01 2015 (r281960) @@ -805,6 +805,7 @@ bufinit(void) struct buf *bp; int i; + CTASSERT(MAXBCACHEBUF >= MAXBSIZE); mtx_init(&bqclean, "bufq clean lock", NULL, MTX_DEF); mtx_init(&bqdirty, "bufq dirty lock", NULL, MTX_DEF); mtx_init(&rbreqlock, "runningbufspace lock", NULL, MTX_DEF); @@ -846,8 +847,8 @@ bufinit(void) * by the system. */ maxbufspace = (long)nbuf * BKVASIZE; - hibufspace = lmax(3 * maxbufspace / 4, maxbufspace - MAXBSIZE * 10); - lobufspace = hibufspace - MAXBSIZE; + hibufspace = lmax(3 * maxbufspace / 4, maxbufspace - MAXBCACHEBUF * 10); + lobufspace = hibufspace - MAXBCACHEBUF; /* * Note: The 16 MiB upper limit for hirunningspace was chosen @@ -857,9 +858,9 @@ bufinit(void) * The lower 1 MiB limit is the historical upper limit for * hirunningspace. */ - hirunningspace = lmax(lmin(roundup(hibufspace / 64, MAXBSIZE), + hirunningspace = lmax(lmin(roundup(hibufspace / 64, MAXBCACHEBUF), 16 * 1024 * 1024), 1024 * 1024); - lorunningspace = roundup((hirunningspace * 2) / 3, MAXBSIZE); + lorunningspace = roundup((hirunningspace * 2) / 3, MAXBCACHEBUF); /* * Limit the amount of malloc memory since it is wired permanently into @@ -3073,8 +3074,9 @@ getblk(struct vnode *vp, daddr_t blkno, KASSERT((flags & (GB_UNMAPPED | GB_KVAALLOC)) != GB_KVAALLOC, ("GB_KVAALLOC only makes sense with GB_UNMAPPED")); ASSERT_VOP_LOCKED(vp, "getblk"); - if (size > MAXBSIZE) - panic("getblk: size(%d) > MAXBSIZE(%d)\n", size, MAXBSIZE); + if (size > MAXBCACHEBUF) + panic("getblk: size(%d) > MAXBCACHEBUF(%d)\n", size, + MAXBCACHEBUF); if (!unmapped_buf_allowed) flags &= ~(GB_UNMAPPED | GB_KVAALLOC); Modified: head/sys/sys/param.h ============================================================================== --- head/sys/sys/param.h Sat Apr 25 00:51:44 2015 (r281959) +++ head/sys/sys/param.h Sat Apr 25 00:52:01 2015 (r281960) @@ -233,10 +233,19 @@ * and may be made smaller at the risk of not being able to use * filesystems which require a block size exceeding MAXBSIZE. * + * MAXBCACHEBUF - Maximum size of a buffer in the buffer cache. This must + * be >= MAXBSIZE and can be set differently for different + * architectures by defining it in <machine/param.h>. + * Making this larger allows NFS to do larger reads/writes. + * * BKVASIZE - Nominal buffer space per buffer, in bytes. BKVASIZE is the * minimum KVM memory reservation the kernel is willing to make. * Filesystems can of course request smaller chunks. Actual * backing memory uses a chunk size of a page (PAGE_SIZE). + * The default value here can be overridden on a per-architecture + * basis by defining it in <machine/param.h>. This should + * probably be done to increase its value, when MAXBCACHEBUF is + * defined as a larger value in <machine/param.h>. * * If you make BKVASIZE too small you risk seriously fragmenting * the buffer KVM map which may slow things down a bit. If you @@ -248,7 +257,12 @@ * normal UFS filesystem. */ #define MAXBSIZE 65536 /* must be power of 2 */ +#ifndef MAXBCACHEBUF +#define MAXBCACHEBUF MAXBSIZE /* must be a power of 2 >= MAXBSIZE */ +#endif +#ifndef BKVASIZE #define BKVASIZE 16384 /* must be power of 2 */ +#endif #define BKVAMASK (BKVASIZE-1) /* _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
