Date: Tue, 16 Apr 2019 17:54:51 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r346287 - stable/12/sys/fs/msdosfs Message-ID: <201904161754.x3GHspIg044854@repo.freebsd.org>
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Author: kib Date: Tue Apr 16 17:54:51 2019 New Revision: 346287 URL: https://svnweb.freebsd.org/changeset/base/346287 Log: MFC r346064: Fix dirty buf exhaustion easily triggered with msdosfs. Modified: stable/12/sys/fs/msdosfs/msdosfs_fat.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/fs/msdosfs/msdosfs_fat.c ============================================================================== --- stable/12/sys/fs/msdosfs/msdosfs_fat.c Tue Apr 16 17:43:14 2019 (r346286) +++ stable/12/sys/fs/msdosfs/msdosfs_fat.c Tue Apr 16 17:54:51 2019 (r346287) @@ -54,6 +54,7 @@ #include <sys/systm.h> #include <sys/buf.h> #include <sys/mount.h> +#include <sys/vmmeter.h> #include <sys/vnode.h> #include <fs/msdosfs/bpb.h> @@ -979,6 +980,7 @@ extendfile(struct denode *dep, u_long count, struct bu u_long cn, got; struct msdosfsmount *pmp = dep->de_pmp; struct buf *bp; + struct vop_fsync_args fsync_ap; daddr_t blkno; /* @@ -1086,8 +1088,16 @@ extendfile(struct denode *dep, u_long count, struct bu if (bpp) { *bpp = bp; bpp = NULL; - } else + } else { bdwrite(bp); + } + if (vm_page_count_severe() || + buf_dirty_count_severe()) { + fsync_ap.a_vp = DETOV(dep); + fsync_ap.a_waitfor = MNT_WAIT; + fsync_ap.a_td = curthread; + vop_stdfsync(&fsync_ap); + } } } }
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