Thanks for the hint! Can anyone clarify the reason of not using zone->inactive_ratio in inactive_file_is_low_global()? 06.04.2012, 11:16, "gnehzuil.lzheng@xxxxxxxxx" <gnehzuil.lzheng@xxxxxxxxx>: > On 04/06/2012 08:29 AM, Alexey Ivanov wrote: > >> In progress of migration from FreeBSD to Linux and we found some strange behavior: periodically running tasks (like rsync/p2p deployment) evict mapped pages from memory. >> >> From my little research I've found following lkml thread: >> https://lkml.org/lkml/2008/6/11/278 >> And more precisely this commit: https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4f98a2fee8acdb4ac84545df98cccecfd130f8db >> which along with splitting LRU into "anon" and "file" removed support of reclaim_mapped. >> >> Is there a knob to prioritize mapped memory over unmapped (without modifying all apps to use O_DIRECT/fadvise/madvise or mlocking our data in memory) or at least some way to change proportion of Active(file)/Inactive(file)? > > Hi Alexey, > > Cc to linux-mm mailing list. > > I have met the similar problem and I have sent a mail to discuss it. > Maybe it can help you > (http://marc.info/?l=linux-mm&m=132947026019538&w=2). > > Now Konstantin has sent a patch set to try to expand vm_flags from 32 > bit to 64 bit. Then we can add the new flag into vm_flags and > prioritize mmaped pages in madvise(2). > > Regards, > Zheng > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Alexey Ivanov Yandex Search Admin Team ************* tel.: +7 (985) 120-35-83 (int. 7176) http://staff.yandex-team.ru/rbtz ************* -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>