My apologies, I may have been unclear. I've been trying to clear all
the cache data and have been calling the following: to reduce the
dcache -- prune_dcache(0);
page cache -- empty_dcache(); -- a clone of prune dcache that calls
clear_inode_pages() for each dcache entry
-- and/or a modified shrink_mmap() that
if (xxxx_under_min()) removed and (below)
inode cache -- free_inode_memory(20);
buffer cache -- sys_sync(); & invalidate_all_buffers();
all in an order something like this.
Is there a better way you'd recommend for clearing the cached I/O
data? I suspect the best things seems to be a reboot, and then memory
exhaust will suffice as an approximation despite its side effects.
In any case, sincerely thanks for your patience and help,
--tmk
----------------------------------------------------------------------- Tom M. Kroeger Pray for wind Graduate Student, UC Santa Cruz \ Pray for waves e-mail: tmk@cs.ucsc.edu |\ and Pray it's your day off! http://www.cse.ucsc.edu/~tmk |~\ (831) 459-4458 |__\ (831) 426-9055 home ,----+--
int shrink_mmap_all( void) { struct page * page; int i;
i = max_mapnr; while (i-- > 0) { int referenced; page = mem_map +i; /* This works even in the presence of PageSkip because * the first two entries at the beginning of a hole will * be marked, not just the first. */
if (PageSkip(page)) { continue; } referenced = test_and_clear_bit(PG_referenced, &page->flags);
if (PageLocked(page)) continue;
/* We can't free pages unless there's just one user */ if (atomic_read(&page->count) != 1) continue;
if (PageSwapCache(page)) { if (referenced && swap_count(page->offset) != 1) continue; delete_from_swap_cache(page); continue; }
if (referenced) continue;
/* Is it a buffer page? */ if (page->buffers) { debug(11,"buffer page %d\n",i); free_buffers(page); continue; }
/* is it a page-cache page? */ if (page->inode) { remove_inode_page(page); } } return 0; }
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