nsIOService reads the network.buffer.cache.count and network.buffer.cache.size at startup when executing nsIOService::Init() but does not react to changes to these preferences. Since nsIOService::Init() is invoked before Preferences::ResetAndReadUserPrefs() is called the value manually entered via about:config have no effect.

This simple patch adds "network.buffer.cache.count" and "network.buffer.cache.size" to the observed preferences so that nsIOService will pick up their changes correctly.

Comment on attachment 724959 [details] [diff] [review] [PATCH] Make nsIOService properly pick-up user-specified network.buffer.cache.* preferences Review of attachment 724959 [details] [diff] [review]: ----------------------------------------------------------------- I presume that gDefaultSegmentCount and gDefaultSegmentSize are aligned, so access to them is atomic. r+

(In reply to Honza Bambas (:mayhemer) from comment #2) > I presume that gDefaultSegmentCount and gDefaultSegmentSize are aligned, so > access to them is atomic. Yes, they're uint32_t globals so access to them is atomic on every architecture we support. The try run is here: https://tbpl.mozilla.org/?tree=Try&rev=995aece734c2