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Let the cleaner use LFCNRECLAIM to help empty segments along, if it 

thinks it needs to clean and segments are tantalizingly lingering
in the "empty but dirty" state.
This commit is contained in:
perseant 2003-03-02 04:38:20 +00:00
parent 9192f047ac
commit 5646727e5a
1 changed files with 29 additions and 3 deletions
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32
libexec/lfs_cleanerd/cleanerd.c
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@ -1,4 +1,4 @@
/* $NetBSD: cleanerd.c,v 1.45 2003/02/25 23:12:08 perseant Exp $ */ /* $NetBSD: cleanerd.c,v 1.46 2003/03/02 04:38:20 perseant Exp $ */
/*- /*-
* Copyright (c) 1992, 1993 * Copyright (c) 1992, 1993
@ -40,7 +40,7 @@ __COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
#if 0 #if 0
static char sccsid[] = "@(#)cleanerd.c 8.5 (Berkeley) 6/10/95"; static char sccsid[] = "@(#)cleanerd.c 8.5 (Berkeley) 6/10/95";
#else #else
__RCSID("$NetBSD: cleanerd.c,v 1.45 2003/02/25 23:12:08 perseant Exp $"); __RCSID("$NetBSD: cleanerd.c,v 1.46 2003/03/02 04:38:20 perseant Exp $");
#endif #endif
#endif /* not lint */ #endif /* not lint */
@ -510,7 +510,7 @@ clean_fs(FS_INFO *fsp, unsigned long (*cost_func)(FS_INFO *, SEGUSE *),
{ {
struct seglist *segs, *sp; struct seglist *segs, *sp;
long int to_clean, cleaned_bytes; long int to_clean, cleaned_bytes;
unsigned long i, total; unsigned long i, j, total;
struct rusage ru; struct rusage ru;
fsid_t *fsidp; fsid_t *fsidp;
int error; int error;
@ -524,7 +524,33 @@ clean_fs(FS_INFO *fsp, unsigned long (*cost_func)(FS_INFO *, SEGUSE *),
return; return;
} }
total = i = choose_segments(fsp, segs, cost_func); total = i = choose_segments(fsp, segs, cost_func);
/*
* If we can get lots of cleaning for free, do it now.
* The theory is that if empty dirty segments exist, we
* can afford to write a bunch of inodes, directory blocks,
* and Ifile blocks in order to clean them. (If things are
* so bad that we don't have enough segments to do this, though,
* we're in trouble.)
*/
sp = segs; sp = segs;
for (j = 0; j < total && sp->sl_bytes == 0; j++) {
if (debug)
syslog(LOG_DEBUG,"Not cleaning empty segment %ld",
sp->sl_id);
++cleaner_stats.segs_empty;
sp++;
i--;
}
if (j > 0) {
/* Call limited checkpoint to help clean empty segs */
fcntl(ifile_fd, LFCNRECLAIM, 0);
}
if (j > nsegs) {
free(segs);
return;
}
#if 0 #if 0
/* If we relly need to clean a lot, do it now */ /* If we relly need to clean a lot, do it now */
if(fsp->fi_cip->clean < 2 * fsp->fi_lfs.lfs_minfreeseg) if(fsp->fi_cip->clean < 2 * fsp->fi_lfs.lfs_minfreeseg)