* Re: Zram/Zmalloc Questions [not found] <CANOqyr7Lwgyax9F4Jogi=ecqKMbCTUQ5LmuXVk5LfTk0ksv4rg@mail.gmail.com> @ 2016-11-08 0:33 ` Sergey Senozhatsky [not found] ` <CANOqyr4GuFs+Ayt7UFUKnssTFTP=NTRcP-p12xjPpvqxV4+ZYg@mail.gmail.com> 0 siblings, 1 reply; 2+ messages in thread From: Sergey Senozhatsky @ 2016-11-08 0:33 UTC (permalink / raw) To: Cory Pruce; +Cc: Nitin Gupta, Sergey Senozhatsky, minchan, linux-kernel On (11/07/16 10:50), Cory Pruce wrote: > I see in zsmalloc.c that zsmalloc is mounted as a pseudo filesystem (block > device I believe). However, there are empty implementations of > zsmalloc_mount and zsmalloc_unmount for when CONFIG_COMPACTION is not set. no. it's because compaction needs an inode via alloc_anon_inode(). look at inode->i_mapping->a_ops. zsmalloc does require or depend on mounting otherwise. [..] > Why is bit_spin_lock being used instead of the general spin_lock? Is there > some performance benefit? no. to save the memory. look at bits squeezing from handle. otherwise, one would have to allocate both handle and a 4-byte spin_lock. I believe bit_spin_lock in general have worse performance than spin_lock, just because spin_lock is not always "a silly busy loop", while bit_spin_lock is. -ss ^ permalink raw reply [flat|nested] 2+ messages in thread
[parent not found: <CANOqyr4GuFs+Ayt7UFUKnssTFTP=NTRcP-p12xjPpvqxV4+ZYg@mail.gmail.com>]
* Re: Zram/Zmalloc Questions [not found] ` <CANOqyr4GuFs+Ayt7UFUKnssTFTP=NTRcP-p12xjPpvqxV4+ZYg@mail.gmail.com> @ 2016-11-08 3:46 ` Sergey Senozhatsky 0 siblings, 0 replies; 2+ messages in thread From: Sergey Senozhatsky @ 2016-11-08 3:46 UTC (permalink / raw) To: Cory Pruce; +Cc: Sergey Senozhatsky, Nitin Gupta, minchan, linux-kernel On (11/07/16 19:36), Cory Pruce wrote: > Also, my emails get marked as spam by [1]vger.kernel.org. Any experience > with this? switch to plain-text mode. don't send out in HTML format as you do now. -ss ^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-11-08 0:33 ` Zram/Zmalloc Questions Sergey Senozhatsky
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2016-11-08 3:46 ` Sergey Senozhatsky
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