There was quite a long discussion [1] about swap size suggestions and this algorithm is the result. Moreover we should use 'swap --hibernation' instead of 'swap --same-as-ram'. [1] https://home.corp.redhat.com/wiki/swap-size-recommendations Resolves: rhbz#744129 Resolves: rhbz#815557 --- installclass.py | 2 +- iutil.py | 48 +++++++++++++++--------------------------------- kickstart.py | 4 ++-- 3 files changed, 18 insertions(+), 36 deletions(-) diff --git a/installclass.py b/installclass.py index 9514097..a417762 100644 --- a/installclass.py +++ b/installclass.py @@ -191,7 +191,7 @@ class BaseInstallClass(object): if bootreq: autorequests.extend(bootreq) - (minswap, maxswap) = iutil.swapSameAsRam() + (minswap, maxswap) = iutil.swapSuggestion() autorequests.append(PartSpec(fstype="swap", size=minswap, maxSize=maxswap, grow=True, asVol=True)) diff --git a/iutil.py b/iutil.py index f7254e2..c583fe2 100644 --- a/iutil.py +++ b/iutil.py @@ -447,52 +447,34 @@ def memInstalled(): ## Suggest the size of the swap partition that will be created. # @param quiet Should size information be logged? # @return A tuple of the minimum and maximum swap size, in megabytes. -def swapSuggestion(quiet=0): +def swapSuggestion(quiet=0, hibernation=False): mem = memInstalled()/1024 mem = ((mem/16)+1)*16 if not quiet: log.info("Detected %sM of memory", mem) - - #table suggested in rhbz#744129 - if mem <= 4096: - minswap = 2048 - maxswap = 2048 - elif 4096 < mem <= 16384: - minswap = 4096 - maxswap = 4096 + #chart suggested in the discussion with other teams + #see: https://home.corp.redhat.com/wiki/swap-size-recommendations + if mem < 2048: + swap = 2 * mem - elif 16384 < mem <= 65536: - minswap = 8192 - maxswap = 8192 + elif 2048 <= mem < 8192: + swap = mem - elif 65536 < mem <= 262144: - minswap = 16384 - maxswap = 16384 + elif 8192 <= mem < 65536: + swap = mem / 2 else: - minswap = 32768 - maxswap = 32768 + swap = 4096 if not quiet: - log.info("Swap attempt of %sM to %sM", minswap, maxswap) + log.info("Swap attempt of %sM", swap) - return (minswap, maxswap) + if hibernation and mem <= 65536: + swap = mem + swap -def swapSameAsRam(quiet=0): - mem = memInstalled() / 1024 - mem = ((mem / 16) + 1) * 16 - if not quiet: - log.info("Detected %sM of memory", mem) - - #see #rhbz587152 - if mem <= SWAP_SIZE_LIMIT: - log.info("Swap attempt of %sM to %sM", mem, mem) - return (mem, mem) - else: - log.warning("Cannot create swap of size %sM, using upper bound %sM", - mem, SWAP_SIZE_LIMIT) - return (SWAP_SIZE_LIMIT, SWAP_SIZE_LIMIT) + #we have to return minimum and maximum swap size + return (swap, swap) ## Create a directory path. Don't fail if the directory already exists. # @param dir The directory path to create. diff --git a/kickstart.py b/kickstart.py index c28f030..9f56019 100644 --- a/kickstart.py +++ b/kickstart.py @@ -743,8 +743,8 @@ class PartitionData(commands.partition.RHEL6_PartData): (self.size, self.maxSizeMB) = iutil.swapSuggestion() self.grow = True - if self.sameAsRam: - (self.size, self.maxSizeMB) = iutil.swapSameAsRam() + if self.hibernation: + (self.size, self.maxSizeMB) = iutil.swapSuggestion(hibernation=True) self.grow = False # if people want to specify no mountpoint for some reason, let them # this is really needed for pSeries boot partitions :( -- 1.7.4.4 _______________________________________________ Anaconda-devel-list mailing list Anaconda-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/anaconda-devel-list
