Messages in this thread | | | Date | Thu, 23 May 2002 09:46:08 -0700 | From | "Martin J. Bligh" <> | Subject | Re: [BUG] 2.4 VM sucks. Again |
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>> > Starting up 30 downloads from a custom HTTP server (or Tux - or Apache - >> > doesn't matter), file size is 3-6GB, download speed = ~4.5Mbps. After >> > some time the kernel (a) goes bOOM (out of memory) if not having any >> > swap, or (b) goes gong swapping out anything it can. >> >> How much RAM do you have, and what does /proc/meminfo >> and /proc/slabinfo say just before the explosion point? > > I have 1 gig - highmem (not enabled) - 900 megs. > for what I can see, kernel can't reclaim buffers fast enough. > ut looks better on -aa.
Sounds like exactly the same problem we were having. There are two approaches to solving this - Andrea has a patch that tries to free them under memory pressure, akpm has a patch that hacks them down as soon as you've fininshed with them (posted to lse-tech mailing list). Both approaches seemed to work for me, but the performance of the fixes still has to be established.
I've seen over 1Gb of buffer_heads ;-)
M.
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