Messages in this thread | | | Date | Thu, 26 Feb 2004 10:43:38 -0700 | From | Andreas Dilger <> | Subject | Re: 2.4.25 - large inode_cache |
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On Feb 26, 2004 11:23 -0300, Marcelo Tosatti wrote: > On Thu, 26 Feb 2004, Jakob Oestergaard wrote: > > On Thu, Feb 26, 2004 at 10:08:23AM -0300, Marcelo Tosatti wrote: > > > This should be normal behaviour -- the i/d caches grew because of file > > > system activitity. This memory will be reclaimed in case theres pressure. > > > > But how is "pressure" defined? > > > > Will a heap of busy knfsd processes doing reads or writes exert > > pressure? Or is it only local userspace that can pressurize the VM (by > > either anonymously backed memory or file I/O). > > Any allocator will cause VM pressure.
But won't all of the knfsd allocations be by necessity GFP_NOFS to avoid deadlocks, so they will be unable to clear inodes or dentries? Both shrink_icache_memory() and shrink_dcache_memory() do nothing if __GFP_FS isn't set so if there is no user-space allocation pressure we will never get into the dcache/icache freeing paths from knfsd allocations.
Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/
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