Date: Sat, 9 Jan 2010 23:50:47 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r201964 - user/kmacy/releng_8_fcs_buf_xen/sys/kern Message-ID: <201001092350.o09NolPd053099@svn.freebsd.org>
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Author: kmacy Date: Sat Jan 9 23:50:47 2010 New Revision: 201964 URL: http://svn.freebsd.org/changeset/base/201964 Log: repeatedly invoke lowmem handler if buffer request can't be satisfied Modified: user/kmacy/releng_8_fcs_buf_xen/sys/kern/vfs_bio.c Modified: user/kmacy/releng_8_fcs_buf_xen/sys/kern/vfs_bio.c ============================================================================== --- user/kmacy/releng_8_fcs_buf_xen/sys/kern/vfs_bio.c Sat Jan 9 23:43:22 2010 (r201963) +++ user/kmacy/releng_8_fcs_buf_xen/sys/kern/vfs_bio.c Sat Jan 9 23:50:47 2010 (r201964) @@ -1268,6 +1268,7 @@ brelse(struct buf *bp) * background write. */ if ((bp->b_flags & B_VMIO) + && (bp->b_vp != NULL) && !(bp->b_vp->v_mount != NULL && (bp->b_vp->v_mount->mnt_vfc->vfc_flags & VFCF_NETWORK) != 0 && !vn_isdisk(bp->b_vp, NULL) && @@ -1730,7 +1731,7 @@ getnewbuf(struct vnode *vp, int slpflag, struct thread *td; struct buf *bp; struct buf *nbp; - int defrag = 0; + int defrag = 0, retrying = 0; int nqindex; static int flushingbufs; @@ -1995,10 +1996,16 @@ restart: if (gbflags & GB_NOWAIT_BD) return (NULL); + EVENTHANDLER_INVOKE(vm_lowmem, 0); + if (!retrying) { + retrying = 1; + goto restart; + } mtx_lock(&nblock); while (needsbuffer & flags) { if (vp != NULL && (td->td_pflags & TDP_BUFNEED) == 0) { mtx_unlock(&nblock); + EVENTHANDLER_INVOKE(vm_lowmem, 0); /* * getblk() is called with a vnode * locked, and some majority of the
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